Updating to power disks, PS, 5 lug, auto questions

[Roberty]

A guy I know is wanting to update and restore his '66 from the usual 3 speed on the column, 6 banger, power nothing truck. He would like to upgrade to a V8 with turbo 350 trans and power disk brakes up front along with a 5 lug rear. What donor truck/trucks would be his best bet. It's got coil springs all around so I'm guessing a '71 or '72 Chevy rear end there. I have a 1978 Chevy truck I'm parting out that has power disk brakes, power steering, and a turbo 350 trans. With the exception of the rear end (leaf vs. coil) will the rest of the stuff off my '78 work easily to convert/upgrade him? I know the '67 + trucks pretty well but am lost on the '66 and earlier trucks as far as upgrading goes.

Thanks in advance,
Robert