Cool, so whats the plan?
EJ257 with cosworth internals? What turbo? TD06-20g would go good on it and achieve your hP and torque goals..
Whats the plan for a tranny? 6 speed would be the deal, try to get the good diffs too, front and rear, and variable centre diff, what
ECU will you run? do you want AVCS and the
ecu it to control your centre diff? You may need to get the wheel sensors as well, if not a manually adjusted centre diff works fine too..
Do the 6 speeds fit in a GC8 without too much drama???
will be a fun project, what the plan suspension wise? Coilovers or some good sti dampers? I have just upgraded the sti dampers in my car, they work fine for everyday driving and I suspect would stand up to a trackday or 5..