hey guys. i am in the process of doing the bb swap. i currently have a 350 with full length headers. when i put the 454 in with full length headers, are the headers going to match up with my current exhaust. i just have straight pipes to mufflers that dump before the rear end. will it make a difference if i use bb mounts or the sb mounts?

check the measurements and height difference

When I bought my car, it didn't have an engine, but it did have fairly new exhaust on it. I'm guessing it had a small block in it.

When I put in my BB, it bolted right up to the exhaust. My BB has full length headers.

It'll be close, but I'm going to say yes, it will fit.

ryan79..........when you put your BB in, did you use SB or BB engine mounts?