I'd do:
CRC lowered rear pod plates (WAY more use out of tires)
IRS rear ride height adjusters (WAY easier to make rear height adjustments, the Associated/CRC ones are a joke).
CRC front ride height shims (AE's four 1/16" washers are a similar cruel joke).
Lunsford Ti front axles (threads are rolled rather than cut, won't break like the stock steel axle).
Go race.