My transmission is going out so im going to swap both the engine and transmission. I currently have a 305 tpi witha 700r4. Im not changing the tranny so i dont need help there. Im swapping to an 88 350 tpi. I have everything for it including the ecm, prom, and everything else. But i already have the tpi wirng harness in my car so i was wondering if i could just plug the ecm and the prom into my wiring harness and everything hook up on the 350. Would that happen? Also would a set of 305 H.O. heads do any good on a 350? Thanks for any help or opinions.

 

im pretty sure the wiring harness should be pretty close. the only real difference is the ecm and injectors

 

You may also need a knock sensor and/or an esc. The esc for sure though. The 305 heads will bump your compression but you may want to put some bigger valves in them

 

like madmike said, the 305 heads will bump up your compression, but they stop flowing @ about 4200rpm. the knock senor is different , but i suggest putting a knock sensor for a LT4 Corvette in it instead of a stock one. the LT4 knock sensor will allow the engine to run a bit more timing (only a degree or two) but somettimes it's enough to make a difference in the way the car runs .the ESC is the same , same part # for 5.0 and 5.7. so as long as you get the prom chip , injectors , and knock sensor for a 5.7...you should be ready yank and drop.

 

I would check that again. The Electronic Spark Control (the part the knock sensor sends it signal too) is not the same part numbers for a 305 and 350.

 

I'm pretty knew to this tpi stuff. Im an old chevy man. Im getting the motor out of a donor car that has been wrecked so everything is there. Also do i need to swap out any gauges or there wiring
or will they work with the 350?

 

the wiring should be str8 a few minor mods with it but u will need new injectors and ecm of course. btw when ur ready for injectors pm me my boy has some nice ones for cheap.

 

the acdelco part # for a 5.0 and 5.7 are the same part # , i looked it up at acdelco.com