opinion on R3/W8 340 (358ci)

I prefer the "observed" numbers, but either way in a 3000lb well sorted out car, low 10's should be a breeze with that engine. The fitment issues will be the toughest to deal with for sure, and something I can't help you with. I'd bet though that a custom header is probably in your future. But hey, you gotta pay to play :D.

Good luck, she'll be a fun ride!