Ls7 swap or bore the 305 tpi 30 over
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Joined: Dec 2011
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From: Naples Fl
Car: 1986 Trans Am
Engine: 305 H.O. TPI
Transmission: 700R4
Axle/Gears: 3.73
Ls7 swap or bore the 305 tpi 30 over
Im thinking about swapping out my 305 tpi and swapping it with a 427/LS7.. Or boring the 305 30 over any thoughts or suggestions
Joined: Sep 2003
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Ls7 swap or bore the 305 tpi 30 over
How is the LS7 swap even an option? Bore a 305 over or swap to a completely different, completely expensive LS7? Thats a completely different ball game all together.
If you could even afford to do a LS7 swap, why would you ever consider a rebuilt 305 as an option?
If you could even afford to do a LS7 swap, why would you ever consider a rebuilt 305 as an option?
Thread Starter
Junior Member
Joined: Dec 2011
Posts: 11
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From: Naples Fl
Car: 1986 Trans Am
Engine: 305 H.O. TPI
Transmission: 700R4
Axle/Gears: 3.73
Re: Ls7 swap or bore the 305 tpi 30 over
a buddy of mine wreaked his zo6 and offered me the LS7 motor out of it for $500 its only got 25k miles on it and its still in good shape...
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Ls7 swap or bore the 305 tpi 30 over
Are you serious?? DEFINATELY DO THE SWAP! The heads alone on that motor are worth maybe 2 grand
Thats a steal and a half. You could make alot of money on that motor if resold at proper market value.
Its gonna be a lot of work to swap it all in, but definately worth it over building a 305.
Thats a steal and a half. You could make alot of money on that motor if resold at proper market value. Its gonna be a lot of work to swap it all in, but definately worth it over building a 305.
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Car: 1983 Camaro Z28
Engine: 383
Transmission: TKO 600
Axle/Gears: Strange S60
Re: Ls7 swap or bore the 305 tpi 30 over
Are you serious?? DEFINATELY DO THE SWAP! The heads alone on that motor are worth maybe 2 grand
Thats a steal and a half. You could make alot of money on that motor if resold at proper market value.
Its gonna be a lot of work to swap it all in, but definately worth it over building a 305.
Thats a steal and a half. You could make alot of money on that motor if resold at proper market value. Its gonna be a lot of work to swap it all in, but definately worth it over building a 305.
Joined: Sep 2004
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: Ls7 swap or bore the 305 tpi 30 over
Are you serious?? DEFINATELY DO THE SWAP! The heads alone on that motor are worth maybe 2 grand
Thats a steal and a half. You could make alot of money on that motor if resold at proper market value.
Its gonna be a lot of work to swap it all in, but definately worth it over building a 305.
Thats a steal and a half. You could make alot of money on that motor if resold at proper market value. Its gonna be a lot of work to swap it all in, but definately worth it over building a 305.
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: Ls7 swap or bore the 305 tpi 30 over
Joined: Jul 2003
Posts: 10,532
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Ls7 swap or bore the 305 tpi 30 over
Originally Posted by 305sbc
LOL I nominate this for TGO post of the year.
- and on a first post too. This should get you some sort of honorary member title.
- and on a first post too. This should get you some sort of honorary member title.
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From: greenfield indiana
Car: 86' IROC-Z....and 5 other 3rdgens
Engine: 383 hsr
Transmission: built 700r4
Axle/Gears: stock 3.23, 10bolt
Re: Ls7 swap or bore the 305 tpi 30 over
hahaha wow....u make the options between the two as if they are almost an equal path to go down lol. you could put 5k into the 305 and the ls7 will STILL s.h.i.t on it. go buy that ls7 for $500, and ill give you $600 for it so you can make a quick extra $100 appear outta mid air in your pocket...
Re: Ls7 swap or bore the 305 tpi 30 over
Alright now.Will someone please just get off their duff and build a moon shot killer 305 and get it over with?????????????
Ya you in the back clutching ya piggy bank.
Ya you in the back clutching ya piggy bank.

Joined: Mar 2000
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The moon shot 305's have been built. The last one was about 10 years ago. That ship has sailed. Pure silliness to build one now. Unless you're building an NHRA stock class race car.
I'll have to admit when I first saw the topic line, my first thought was, "Oh, brother, here we go again." LelySwat69, the ball's in your court to prove this is a serious question.
I'll have to admit when I first saw the topic line, my first thought was, "Oh, brother, here we go again." LelySwat69, the ball's in your court to prove this is a serious question.
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: Ls7 swap or bore the 305 tpi 30 over
AFter thinking about this, he will probably have to sleep with the guy for at least a year to get the LS7 for just $500.
I would have to just bore the 305.
I would have to just bore the 305.
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Ls7 swap or bore the 305 tpi 30 over
im goin with this being a BS post. no way someone is gonna give away a 500hp ls7 for $500. and even if that were to happen no sane person would even blink an eye at the 305 as an option.
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From: Commerce Twp, MI
Car: '91 Camaro
Engine: LSx
Transmission: 4l60e
Axle/Gears: posi
Re: Ls7 swap or bore the 305 tpi 30 over
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From: NJ
Car: 87 Z28
Engine: AFR 383
Transmission: 700R4
Axle/Gears: 4:11
Re: Ls7 swap or bore the 305 tpi 30 over
I call 
who in there right mind would ask this question? i mean really????
LS7 vs bored 305.......
not sure who i should be ashamed of, all of you thinking this guy is serious, or the OP for saying what he said.
LS7 crate goes for what? before i search ill throw out maybe 5-8grand????
I say bore the 305 out seeing you would even throw out a comparision the way you did.
Unfortunatly i was once told i was brutaly honest, if this is the truth, then i needed to say it.
In the end i still call
Maybe your not knowledable, but your friend is a complete idiot. Show pics of the wrecked Z06, with you and your buddy standing next to the car, holding a kit kat bar with your middle finger out telling me to STFU lol
No hard feelings, call it as i see it

who in there right mind would ask this question? i mean really????
LS7 vs bored 305.......
not sure who i should be ashamed of, all of you thinking this guy is serious, or the OP for saying what he said.
LS7 crate goes for what? before i search ill throw out maybe 5-8grand????
I say bore the 305 out seeing you would even throw out a comparision the way you did.
Unfortunatly i was once told i was brutaly honest, if this is the truth, then i needed to say it.
In the end i still call

Maybe your not knowledable, but your friend is a complete idiot. Show pics of the wrecked Z06, with you and your buddy standing next to the car, holding a kit kat bar with your middle finger out telling me to STFU lol
No hard feelings, call it as i see it
Thread Starter
Junior Member
Joined: Dec 2011
Posts: 11
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From: Naples Fl
Car: 1986 Trans Am
Engine: 305 H.O. TPI
Transmission: 700R4
Axle/Gears: 3.73
Re: Ls7 swap or bore the 305 tpi 30 over
its fine you guys dont have to believe me but its the truth the only reason ill get it 4 so cheap is cuz i helped him build it and hes family
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Ls7 swap or bore the 305 tpi 30 over
we want pics of you with this engine to prove it. i wouldnt give my brother a $15000 engine for $500, hell i wouldnt give it to him for $5000.
http://www.jegs.com/i/GM%20Performan...0002/-1?CT=999
http://www.jegs.com/i/GM%20Performan...0002/-1?CT=999
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Ls7 swap or bore the 305 tpi 30 over
yea, noone who helped build a $15000 engine and then gets the chance to buy it for $500 would even question the choice between it and a 305. youre just digging a deeper hole for yourself.
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From: NJ
Car: 87 Z28
Engine: AFR 383
Transmission: 700R4
Axle/Gears: 4:11
Re: Ls7 swap or bore the 305 tpi 30 over
Don't listen to all the haters......
The most logic thing to do would be of course to bore the 305 over. But don't stop at .30 over, goto .60 over for more power. You will get more power, reliability, gas mileage, cheaper yearly maintance on the 305.
305 > LS7 any day of the week
The most logic thing to do would be of course to bore the 305 over. But don't stop at .30 over, goto .60 over for more power. You will get more power, reliability, gas mileage, cheaper yearly maintance on the 305.
305 > LS7 any day of the week
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Ls7 swap or bore the 305 tpi 30 over
might as well just bore the 305 out to a 350's 4" bore......
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From: Pleasant Grove, Utah
Car: 1993 GMC Typhoon
Engine: 4.3 Turbo
Transmission: 4L60
Axle/Gears: 3.42
Re: Ls7 swap or bore the 305 tpi 30 over
Good lord this is waaaay beyond a bs post, his post count is 4, he's actually asking if he should bore a 305 when supposedly he has knowledge to build an LS7, compounding the level of BS, the on top of it all, posts about it being 500$
Trolls, don't feed the trolls
And no we don't believe you, anyone with engine building 101 knowledge wouldn't even consider boring a 305 when you can have a 350, let alone an LS7. Now you're saying he is family to compensate the BS price of $500. "if" and I use that "if" lightly, you are truthfull and can buy it for $500, the block must be cracked or beyond repair
Post a picture of yourself next to the "wrecked" ZO6 holding a sign with your screen name on here with the date and a picture if the engine with the owner showing a $500 trade, that's your only redeeming grace at this point, troll
Trolls, don't feed the trolls
And no we don't believe you, anyone with engine building 101 knowledge wouldn't even consider boring a 305 when you can have a 350, let alone an LS7. Now you're saying he is family to compensate the BS price of $500. "if" and I use that "if" lightly, you are truthfull and can buy it for $500, the block must be cracked or beyond repair
Post a picture of yourself next to the "wrecked" ZO6 holding a sign with your screen name on here with the date and a picture if the engine with the owner showing a $500 trade, that's your only redeeming grace at this point, troll
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From: greenfield indiana
Car: 86' IROC-Z....and 5 other 3rdgens
Engine: 383 hsr
Transmission: built 700r4
Axle/Gears: stock 3.23, 10bolt
Re: Ls7 swap or bore the 305 tpi 30 over
that, OR....just fess up and say "i lied". and no one will pick on you in this thread. its not hard. if i were to ever make something up, and got riduculed to death from it, i would just come clean and say i made it up so no one can continue lol. Member
Joined: Sep 2011
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From: NC
Car: 87' Firebird Formula
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
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From: MD
Car: 88 Iroc-z
Engine: ls1
Transmission: t56
Axle/Gears: 3.42
Re: Ls7 swap or bore the 305 tpi 30 over
Dont listen to any of them... bore that 305 and don't look back.
hell just to help out, ill take that ls7 off your hands so you don't need to worry about it
hell just to help out, ill take that ls7 off your hands so you don't need to worry about it
Re: Ls7 swap or bore the 305 tpi 30 over
poor kid simply wanted to join the fun of theoretical engine swaps which accounts for the majority of the threads here
Do any of you even believe that 1/4 of the plans ever actually occur?
Do any of you even believe that 1/4 of the plans ever actually occur?
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From: Raleigh, NC
Car: 1988 Flame Red Trans am GTA
Engine: Forged 355 4 Bolt, FIRST TPI
Transmission: 700r4
Axle/Gears: ls1 torsen 3.42 gear
Re: Ls7 swap or bore the 305 tpi 30 over
noooooooo way..... whats there to think about...why would you even consider a bored 305 if you can get a ls7 for 500 bux... that engine is worth your car three times over... you could sell that engine and buy a decent ls1 fourthgen if you look around... just saying that makes the post fake... i think you wanted to see people say choose the ls7 and making people think you got a deal of a lifetime and making people jealous.....
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From: Raleigh, NC
Car: 1988 Flame Red Trans am GTA
Engine: Forged 355 4 Bolt, FIRST TPI
Transmission: 700r4
Axle/Gears: ls1 torsen 3.42 gear
Re: Ls7 swap or bore the 305 tpi 30 over
yeah cause when you make another thread people are going to look at you as a liar and wont beleive whatever you post....
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Ls7 swap or bore the 305 tpi 30 over
i own half the moon, anyone wanna start colonizing it? ill cut you one hell of a deal on property rights....
Thread Starter
Junior Member
Joined: Dec 2011
Posts: 11
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From: Naples Fl
Car: 1986 Trans Am
Engine: 305 H.O. TPI
Transmission: 700R4
Axle/Gears: 3.73
Re: Ls7 swap or bore the 305 tpi 30 over
m getting just the ls7 block not the heads and everything else..hes parting.. i wish he would have clarified that b4 i made this post.... FML
Joined: Sep 2004
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: Ls7 swap or bore the 305 tpi 30 over
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Ls7 swap or bore the 305 tpi 30 over
sell the block. no way youll find the cash to put it back together.
Joined: Aug 2009
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From: Clinton Township, Michigan
Car: 91 GTA, 73 Z28
Engine: 355, 6.0L
Transmission: TH350, 4L80E
Axle/Gears: 3.42, 3.73
Re: Ls7 swap or bore the 305 tpi 30 over
i didnt read any of the earlier posts, but a 305 cant even stand to compare to that of an ls7 even if you threw half a vettes price tag at it.
Joined: Aug 2009
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From: Clinton Township, Michigan
Car: 91 GTA, 73 Z28
Engine: 355, 6.0L
Transmission: TH350, 4L80E
Axle/Gears: 3.42, 3.73
Re: Ls7 swap or bore the 305 tpi 30 over
ooooh, did someone say hes gonna be dishing out some cash yet?
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From: Port Charlotte, FL
Car: 1986 WS6 TransAm
Engine: THREEFIDDY!
Transmission: T5
Axle/Gears: 3.73
Re: Ls7 swap or bore the 305 tpi 30 over
Next time you get the chance to go diving and catch a glimpse of a ship that is anchored, look at the end of the chain. You should see a 305.
LS7 for $500? BULL.
LS7 for $500? BULL.
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From: Katy TEXAS (West Houston)
Car: 1992 Camaro RS
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From: Port Charlotte, FL
Car: 1986 WS6 TransAm
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Transmission: T5
Axle/Gears: 3.73
Supreme Member
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Ls7 swap or bore the 305 tpi 30 over
maybe they both work at the GM plant?
Re: Ls7 swap or bore the 305 tpi 30 over
Just take the ls7 block and sway your top end from your 305 on to it. You save money, and with your extensive knowledge on building ls motors and sports cars, it won't cost much! TPI 427!
Joined: Aug 2009
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From: Clinton Township, Michigan
Car: 91 GTA, 73 Z28
Engine: 355, 6.0L
Transmission: TH350, 4L80E
Axle/Gears: 3.42, 3.73
Re: Ls7 swap or bore the 305 tpi 30 over
u sounded very serious, good job you definitely fooled me. but im glad you werent serious.









