9.1:1 is not high!!! Simon Norris built a YB with comp a bit higher than this that engine ran custom cams etc and a GT30 or 35 it made 632 bhp

Same with JEMS big power yb, build a n/a motor as well as possible then turbo it

With the flow of these turbos being greater and less restrictive heat it not too much of an issue so more comp can be used to create more power!!!!

IMO yes the 2wd manifold

Chris knows his stuff