My only comment is that this guy is apparently unaware of how Pontiac Firebirds were built.
Our Firebirds don't suffer any discernable problems driving with a presumably out-of-phase driveline. So I'm rather certain yours won't either.
But if you want to straighten it out and over-ride how Pontiac designed it, I wish you Godspeed...it might work out fine for ya. Might not. But man I believe is it gonna cause some other fit problems for you in the process....steering box, exhaust, shroud, brake booster, factory air if equipped...all come to mind. Prepare yourself for some extra (and IMO unnecessary) custom work if you decide to set this engine at a different angle than Pontiac designed....
To answer your question about whether Camaro and Firebird subframes are different: No. They are identical. Engine mounts, however, are different. And tranny xmembers are different.
