Im running the RB 2659 with short conical header (came with the engine) and its great, the the Nova 2630 will also work very well.
Ill tell you this:
Nova Flash .12 - Good bottom, less on top.
Nova 353 - Good top end, less on the bottom.
I think the RB T10 might have the best of both, or somewhere in between. Otherwise it just kills, even tuned rich.
Car-less (Velox V10 or 733) // RB T10.5"+" (JB Modified) // Bluebird BMS-990DMG (St) & BMS-631 (T/B) // ATS 16% // Capricorn Wheels // Protoform
"70% of the time, it works ALL the time"