Well, to begin with, what you are planning is not called "restoring" it is called hot rodding. Restoring means to bring the car back to original manufacturers specs.
You will not find a late model car or truck frame that will fit under your A without some major surgery on the frame. You need to pick up a couple of Street Rodder Mags and look through the ads. TONS of stuff out there from bolt ons to complete chassis...
A good four bar frontend with disc brakes and a triangulated four bar out back with an S10 Blazer diff will get you in the ball park. Do some surgery on the original frame (or buy one done) to drop it.