Im using the rb20 sump. The engine builder just bent the fins back to clear the rb30 sump.
If u want good power over 300rwkw, go for a tubular exhaust manifold, and ext. gate
Intake, if u need it, can be bought from RIPS. Give him a pm, he makes a front facing jobbie in kit form (plenum, accelerator cable, throttle body). They must be good if he's in the 10's with his rb30det's