Tunnel ram, linkage and cable question.

Still gotta decide on the TC. (stock converter still) My engine builder says 2,800 but I'm leaning more towards 3,500 as I wanna be pulling as much vacuum as I can before launch and may re cam this winter.

Also how the hell do you tune a plate style carb? I've always had 4150s. do you buy new plates or what? Just tune the primaries?

What about fuel pressure? Now that I'm feeding four bowls vs two, should I up my pressure? I was running 5 1/2-6 PSI. should i bump that up?