How hard should it be to swap an engine out of on a 91 GTA? I have never done an engine swap before, but we are goin to tackle it here soon.

 

I assume you mean you're going from TBI 305 to TPI 350.

Not too bad. Take pictures of both before you start. Tag/label things as you disconnect them. Take out the harness in one piece, you don't need to cut anything. I left sensors that weren't attached to the engine on the harness as I disassembled.

Worst part will probably be dropping the tank to change out the fuel pump. An alternative would be to put in an in-line electric and let the TBI pump be a pusher.

 

No, its got a tpi engine in it but it slung a rod, so we are going to replace it with a 350.

 

As five7kid stated, definitely take pictures prior to removing the old engine as a reference to where items connect. A good advice would be to start putting some of the accessories from the old engine to the new one. As far as TPI goes, the only problem I had was making sure I had the right bolts going to the plenum and so on. Since going with a 350, you need to change the 305-knock sensor to that of a 350. Chip will need to be replaced and fuel pump. Question, since you already have a cat-back system, why not invest on set of headers? Hope I’ve help and best wishes on your engine swap.

 

The fuel pump is the same between 305's and 350 TPI's

 

Ok, I get the part about a '91 GTA having a TPI.

What I don't get is what car is getting an engine. In your sig, you say you have an RS with open element, etc. In the message text, you talk about a '91 GTA.

Are you saying you are helping someone change the engine in their '91 GTA? If so, that typically isn't called an engine "swap", but a replacement. Going from a 305 to a 350 isn't really a "swap", either, since the basics are all the same.

However, the factory used different injectors, fuel pressure regulator, knock sensor, & PROM for 350s than they used for 305s. If you want to call that "swap" stuff, I suppose you could make that arguement. More like "tuning" I'd say.

But, I think I now understand that you're going to change out an engine in a '91 GTA. Am I getting closer?

Did you really want to know how hard it is to change out an engine????

 

I have a 1988 firebird that had a 350 5.7 tune port from a 1989 formula firebird. the engine is dead and gone , i found a low milage 305 tune port from a 1988 or 1989 firebird. I need to know if my wireing harness will work on the 305 tune port. i know that i would have to change the eprom , i have a chip from a 89 firebird that had the 305 in it . i know that the computers are the same. BUT I NEED TO KNOW AOBUT THE WIreing HARNESS .I ALSO know that the fuel pump is the same..email me an answer someone please cescomputers@adelphia.net

 

my 305 had rod knock so all I need is an L98. LB9 to L98 seems like the way to go just because all the accesories still work.