First of all, I am new to the forum, new to the world of chevrolet/pontiac, and the new owner of a 1990 Firebird. Previously, I have only owned Nissans, so forgive me if my ***** knowledge and experience leads me astray.

Anyway, I was given this firebird 2 weeks ago, the body is in very good condition, but it has a 3.1L V6 that, aside from being drastically underpowered, has 272K+ miles and it run very rough. My friend, who lives about 1 hour from here has aquired an older but rebuilt 350 and tranny to replace my engine, but as neither he nor I have a truck, it looks like the swap is going to have to happen in his garage. Now here is the tricky part. I get off work friday afternoon, and have to be back by 5:30am mmonday morning. Is it reasonable to be able to accomplish this swap during the weekend.

I have new motor mounts, and I can fabricate exhaust pipe to work with my current muffler/cat at his place. Accessories and instruments can wait till I get it back home, I just need the engine to run and the brakes to work.

Any time saving tips would help tremendously, as well as general advice.

Did you read the sticky at the top of the page you posted this on?

Do you have ALL of the parts on hand that are called out? That'd be a great place to start....

I'd say it's unlikely that you'll do it in a weekend. You will ALWAYS run into problems.

Welcome aboard, IMP.

Sounds like you've got a decent car to work with. The V6's never were "performance" engines. 3rd gens have some "unique" characteristics that can make them difficult to understand to old-time Chevy guys.

What transmission does this friend have? How complete is the engine? Basically nothing attached to the V6 will work with the V8. The V6 exhaust will kill a V8 (although it will probably run).

By all means, read the sticky at the top of the forum about V6 to V8 swaps.

And, I seriously doubt you could get this done in two days and three evenings. Although there are those who have done it.