Mike, I posted a long winded reply about gearboxes on the original site, but with it's disappearing act I'll answer again.
Richmond aren't happy about the idea of their gearbox behind my motor. The tech guy said it might be OK for a while, but for circuit racing with the occasional dragstrip pass, he wouldn't recommend it. Jerico are stronger again, and
www.gforcetransmissions.com are top of the tree. Mike Long, the owner of G Force Transmissions and Long Shifters is fantastic to talk to. His gearbox is a more precise unit overall, and he's backing his product behind anything up to 1300hp. It's a straight-cut, non synchro box which means adjusting to the clutchless upshifts, and critical heal&toe downshifts.
You might have already seen these pics, but if not :
(blower)
http://777.racemail.com/images/picture_084.jpg (exhaust)
http://777.racemail.com/images/dcp_0035.jpg (SVO block with forged stroker crank, billet rods, JE pistons, solid roller camshaft etc)
http://777.racemail.com/images/dscf0038.jpg (My Triangle Engineering fuel cell with the upper 4 link bars running back into the boot - to keep all rod ends in compression. And no, there won't be much luggage space once the surge tank, three fuel pumps, two filters, fittings, battery and roll bar are all installed in what's left of the boot!)