I own an 84 TA 4bbl HO. I'm eventually going to replace the 305 with a 350. Along with that motor swap, I was going to get TES headers put on the new block (since it will be out of the car and makes it easier).
When I got my car it had a new exhaust already on it (about a year old), so I really don't want to change it just yet due to my limited budget. I do want to get a cat back system installed eventually though.
My question is, would it be sensible to put in the cat back AFTER I put in the new engine with the headers, or should I just wait and save my money so I can do it all at one time? Thanks for any help.

 

I would wait and do it all at the same time. Cause with that new engine, I know ur going to be looking at it and then saying, "Now I got to put on that sh*tty cat-back." Know what I mean? Thats like doing heads and then bolting on the stock manifolds to them. Just disappointing.

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Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

 

If you want to drop your new engine in, then by all means go ahead and do it. There is absolutely no reason to wait till you can afford a cat back to go with it. It'll run and sound better with a good cat back, but it will still be better than what you have.
Hell, when i put my 350 in my 85 i ran it through stock manifolds and a stock 2.25" cat back for a few MONTHS before i could even afford a cat back, and it was years before i got headers.
...ed

 

Thanks for the info.