Not Ranked
Fitzy, I noticed you mentioning you had 42mm venturis. Without a lot of discussion back and forth and details we're just going to be giving you educated guesses, but one thing I'll tell you is that 42 is pretty big for the venturis and I believe that engine doesn't need them that big. One user had a 427 with 37mm venturis and they were ok up until 6000 rpm, then they ran out of air. HE is the user who needs to look at 40 and maybe 42 mm venturis, but on a 363 I'd suggest sticking with the original 37mm pieces, looking through the "Weber Jetting Survey" thread and see somebody who has a build that's close to yours and using their jetting, and their discussion of how it's working and how they arrived at that, as a starting point for yourself.
A lot of problems with Webers can be traced back to the user trying to use too large of a venturi.
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