305 tpi to a 350 tpi

[87IROC-Z]

i was wanting to change the engine in my red iroc out for a 350. would i need to change any wiring, sensors, ect???? please let me know.

[92rs25th]

If you are just going to do a direct block change , like I did , No. You wont have to change sensors , wiring , blah blah blah.

[87IROC-Z]

so the 305 plenium will fit the 350 then

[92rs25th]

Yes , the 305 and the 350 blocks all have same mounts on them as far as bolting things on on the extrerior. Onlything really diffrent is the interior. Stronger , better. It's a long project and will cost some dough as you will need new gaskets but thats about it. DO it up. You'll be surprised about the increase from a simple block change.

[89IROC&RS]

only thing i have heard of needing to change is the injectors and the prom.

[92rs25th]

Bigger injectors for more fuel needs the 350 has. and the prom to control it all as 89 says.

You shouldnt need to change a single wire though or a sensor. I have a TBI set up though not tpi.