305 to 350 Interchangable Parts
#1
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Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
305 to 350 Interchangable Parts
if i plan on dropping in a 350 later on this year what parts can i go ahead and upgrade on my 305 that will give this car a little more umph but can be switched over to the 350??? like headers, maybe an ignition box (i know nothing about ignitions), anything else like that? injectors maybe.....? adj fuel pressure regulator???
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Headers if you get ones sized for a 350, which would be 1¾" primaries; AFPR; I wouldn't bother with an ignition; high-flow cat; cat-nack; not injectors
#3
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hate to jump in before RB or five7 has the chance to answer you, but basically any external part will interchange. only problem area might be heads and intakes with the new style center bolt holes. most of the things you list aren't really regulated by engine size, like the ignition box or AFPR
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Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
is there anyone that sells just a 3" mandrel bent i pipe? i dont think my exhaust guy can mandrel bend pipes but im not for sure.
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Originally posted by ede
hate to jump in before RB or five7
hate to jump in before RB or five7
And by 3" mandrel bent pipe, did you mean standard 3" pipe that can be mandrel bent or 3" pipe that has been pre-bent? Either way, i know mail order places like Summit and JCWhitney carry 3" straight piping. Im sure Jegs has it as well. Any proficient exhaust shop should carry normal 3" pipe as well. Unless you meant stainless, then that might be a mail order thing. Call your local exhaust shops and ask.
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Car: 1986 Pontiac trans am
Engine: L69 305 H.O.
Transmission: Norg werner T5
Re: 305 to 350 Interchangable Parts
ok i have a question i have a 86 trans am with the 305 4 barrel carb and im ordering the 350 from the 87 TA but i want to keep it as a carb will my intake fit from the 305 to the 350? if not what will i have to do?
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Car: '89 Camaro
Engine: LS1
Transmission: 4L65/70E
Axle/Gears: 9 Inch, 3.70 gears
Re: 305 to 350 Interchangable Parts
Wow, reviving a thread from the dead. As for your 305 to 350 swap, if your 305 and 350 heads both have the centerbolt heads, then the intake should bolt right up. If not you can oval out the two center bolt holes on each side of the intake to get it to match up. I've done it before, but the stock 4 barrel intake was basically a piece of crap best used as a boat anchor. I would use an Edelbrock Performer 2101. All of your mounts and accessories will line up just fine. The exhaust on the 305 was marginal at best, and would be better off being swapped in order to make the most power from your 350. I can't remember what headers I used when I did this swap, since it was over 10 years ago, but there are many sugestions on the exhaust forum. The only other issue that you may run into would be tuning the Quadrajet and the ignition curve, since both are partially computer controlled. Neither is impossible, very do-able, but most people aren't willing to do the extra work and just throw a different carb and a regular HEI distributor.
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#8
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Car: 1982 Z28
Engine: three 350s, all casting #370010
Re: 305 to 350 Interchangable Parts
Every part on a 350 and 305 are interchangeable except the pistons, yes that includes the rods an crankshaft, although heads with 2.02 valves will have shrouding issues. Does that mean you should interchange all the parts no, but all of the parts are interchangeable.
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Car: 1986 Pontiac trans am
Engine: L69 305 H.O.
Transmission: Norg werner T5
Re: 305 to 350 Interchangable Parts
i have new headers for the 350 and going to rerun my exhaust but im wanting to order new carb and intake for it but that will come in time im on a budget right now
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 305 to 350 Interchangable Parts
Every part on a 350 and 305 are interchangeable except the pistons, yes that includes the rods an crankshaft, although heads with 2.02 valves will have shrouding issues. Does that mean you should interchange all the parts no, but all of the parts are interchangeable.
The OP revived a almost a 10 yr old thread!
Last edited by TTOP350; 04-01-2013 at 04:30 PM.
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Car: 1982 Z28
Engine: three 350s, all casting #370010
Re: 305 to 350 Interchangable Parts
I would imagine it would be a bad idea to put a 305 crank shaft into a 350, but would it be a bad idea to put a 350 crank and rods in a 305? I would imagine it wouldn't matter especially if you are buying aftermarket.
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Car: 89 formula
Engine: bolt on 305 tpi
Transmission: 700r
Axle/Gears: 342 posi
Re: 305 to 350 Interchangable Parts
does it matter which side the dipstick is on? like if you were to put an older 350 in it.
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Car: '89 Camaro
Engine: LS1
Transmission: 4L65/70E
Axle/Gears: 9 Inch, 3.70 gears
Re: 305 to 350 Interchangable Parts
as long as the oil pan matches the block, no. some headers may interfere with the dipstick being on the other side of the block though though.
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