I definitely suggest MegaSquirt. That gives you full control over ignition timing. Timing will be very important if you want to push the limits. You'll probably run out of traction before you run out of octane, so I would probably wait on the meth until you get everything else sorted out. MegaSquirt is a whole adventure unto its own, without anything else on top of it.

Corbin
'97 GSX dressed like a '95 ESi