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Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

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Old 05-25-2008, 11:15 PM   #1
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Location: montrose colorado
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Car: 1986 trans am
Engine: 305 with almost 2000000 on it!!
Transmission: 700 r4

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305 engine

hey i have looked around on this section and everyone is telling engine swappers to go from a 305 to 350's i am beginning to look into it and i am not a horse power junkie, just want my trans am to live up to my name! i found a 305 on ebay for under 1000 but would like to hear what u have to say, weather the 305's are bad or people just don't perfer them
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Old 05-25-2008, 11:39 PM   #2
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Join Date: Oct 2006
Location: PA
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Car: '92 Camaro Z28
Engine: 305 TPI
Transmission: Built 700R4
Axle/Gears: Unknown 9 Bolt Posi, 3.73s

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Re: 305 engine

The 305 is a great engine. It's also a good starter V8 imo. What will you be using the car for? I prefer to cruise in my 305, and if I wanna run I'll take my dad's 350 IROC. Not saying the 305 can't move.

EDIT: Plus you can always bore out and stroke the 305, make a 334/335 why not?

Last edited by Z2EIGHT; 05-26-2008 at 12:49 AM.
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Old 05-26-2008, 02:16 AM   #3
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Engine: 86 LG4-> ZZ3(LS1)/mild 396
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Quote:
Originally Posted by Z2EIGHT View Post
Plus you can always bore out and stroke the 305, make a 334/335 why not?
Because it's a stupid waste of performance $'s.
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Old 05-26-2008, 09:14 AM   #4
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Car: 86 Trans Am
Engine: 385 Fast Burn
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Re: 305 engine

305's are fine. But you can get more bang for the buck using a 350 as a base instead of a 305. You can get a 305 to come close/match a 350 but your most likely to spend more to get to that same point.

What point do you want to get to though? With the price of gas these days, maybe you'd prefer the 305's slightly better mileage?
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Old 05-27-2008, 12:00 AM   #5
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Car: 1986 Z28 Camaro
Engine: Rebuilt 82' 305
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Re: 305 engine

Personally, I like the 305's. I like 350's a little better, but I never find deals on them around. So I just did a 305 to 305 swap cause a 305 suits my needs for now. I don't think you should be paying near 1,000 though.. unless its low miles, or really pumped up. Have you checked craigslist? There are always good deals on that. 95% of the guys on the forums will probably tell you that a 305 wouldn't be worth it if it was free. but don't listen to them, the 305 is underestimated i think.
But if you indeed get the 305...and you DO want more power.. let me know.. if found an INCREDIBLE article in a camaro magazine telling you how to cheaply pump the 305 up to blow a 350 away. Its a GREAT article

See ya!
-Andrew
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Old 05-27-2008, 01:56 AM   #6
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Car: 82 Berlinetta(2)/57 Bel Air
Engine: 86 LG4-> ZZ3(LS1)/mild 396
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Quote:
Originally Posted by wshbrn91 View Post
... found an INCREDIBLE article in a camaro magazine telling you how to cheaply pump the 305 up to blow a 350 away. Its a GREAT article
What 350 were they comparing it to, a '79 Caprice?

Statements like that are just plain silly. Spend the same money on a 350 and you'll blow the 305 out of the water.
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Old 05-27-2008, 02:03 AM   #7
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Re: 305 engine

small block chevys share so many parts and the cpl parts that are different cost about the same (i.e. piston sets) the most affordable way to make power is to go with the o so common 350, more displacement and most common sbc for aftermarket parts... so when it comes down to it if it costs roughly the same for a 350 y not upgrade.....
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Old 05-27-2008, 07:48 AM   #8
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Engine: 305 with almost 2000000 on it!!
Transmission: 700 r4

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Re: 305 engine

well thanks for all your replies!!!! i will keep looking and if i find a deal on a 350 i might take it because the manifolds fit both right? but if nothing else so far with how crappy my 305 is running right now i am still satisfied, the car is going to be a weekend project car and besides i can take the motor in it now and toy with it with performance parts later on if i like. i will keep my eyes and ears open
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Old 05-27-2008, 04:05 PM   #9
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Car: 82 Berlinetta(2)/57 Bel Air
Engine: 86 LG4-> ZZ3(LS1)/mild 396
Transmission: TH700(T56)/TH400
Axle/Gears: 10-bolt 3.23(4.10)/8.2" 10-bolt4.11

Classifieds Rating: (3)
See sig. Everything that is on the 350 now was previously on the 305, including the heads.

The difference in 1/4 mile ET was over a second.
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