Build 305 or swap to 350?
Thread Starter
Junior Member
Joined: Jan 2011
Posts: 10
Likes: 0
From: Burlington, CT
Car: 1988 Trans AM
Engine: 305 TPI
Transmission: 700R4
Build 305 or swap to 350?
I have an 88 T/A with a 305 TPI and a 700R4. The TPI setup isn't running 100% and is very moody. Some days it runs good, others it wants to stall and has a mind of its own. In CT where i live a car has to be atleast 25 years old to be exempt from emissions testing. And if i swap to a carb'd 350 it wouldn't pass emissions and i wouldn't be able to register it. Ive saved up enough money to do one of two things, Either buy the 350 now and build it up then put it in the car in 2 years, Or i could bring it to a shop and have someone get the TPI running the way it should, What should i do?
Supreme Member
iTrader: (3)
Joined: Apr 2008
Posts: 3,002
Likes: 64
From: Wittman,Az
Car: 86 IROC-Z, '71 RS
Engine: 305 TPI/ 350
Transmission: 700R4/TH350
Re: Build 305 or swap to 350?
Thats a loaded question! Do you have another car to drive while you are building the 350? I, Personally would build the motor for 350 TPI. (With more money, I would just do a LS-1 swap.)
Member
iTrader: (1)
Joined: Oct 2010
Posts: 347
Likes: 0
From: Virginia Beach, VA
Car: 1985 Firebird S/E
Engine: SBC 350, mild cam Vortec heads
Transmission: Rebuilt 700R4 vette servo+shift kit
Axle/Gears: 3.73
Re: Build 305 or swap to 350?
i have a tbi 350 you could put your tpi intake on if your interested looking to get $300 for it bought it for my car but after some more digging turns out the guy that told me it was a 305 didn't know jack
Senior Member
Joined: Mar 2009
Posts: 870
Likes: 0
From: Brick, NJ
Car: 91 Trans Am
Engine: 355 TPI
Transmission: Built T-5
Re: Build 305 or swap to 350?
i would diagnose the problem and fix it....you might have a sensor going bad or something to that effect. the money you would spend on accquireing a good 350 could be put into the 305 and can make a pretty decent powerplant that will compete with a 350. keep in mind that the TPI manifold was designed for the 305
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