[DonC]

Bobby:
Have ERA build as much of it as you can afford.
At a minimum have them bond the body to the frame and I would highly recommend that you arrange for one of their recommended painters (either Tony or Walt Wasco) to paint the car.
As for the rest, see above.
I have the ERA rear end and am very happy with it. Inboard brakes are no fun to work with especially if you have to do anything more than change the pads.
Those ERA boys know their stuff and their workmanship is 1st class.
Whatever you end up doing yourself will be an enjoyable project. ERA has done it's homework and the product quality shows it.
DonC