Sounds like a plan, but i sort of have the same idea, but using the 4wd system from the 4wd corolla,
Unfotunately alot of underbody chassis reconditioning needs to be done, i was also looking at the drivetrain of the AE86 or silvia S13 for the AE92 Seca
But my best guestimation is to follow a basic design and incorporate your own drivetrain, but be prepared for a costly engineering run