SWEET Home Alabama !
Bought a V8-ed 71-72 GT Panel Wagon years ago: 327, powerglide, stock rear-end, stock front suspension and brakes....
S-c-a-r-y ride because the little wimpy brakes had difficulty stopping the extra weight [think it was an all cast iron SBC] (would go an Extra 100-200 "bonus" feet at 65mph)
..........
If you go a bigger rear end you'll get the Bigger brakes to stop the beast.
Think you can also go HD (heavy duty) or metallic front pads also.
Also aluminum heads and intake manifold will reduce your front weight 54 + 20 = 74 lbs.
Relocating the battery to the passenger rear corner may assist.
Good project --enjoy the journey.
Future car will look like this guy's cool Pro-Street Vega.
(Free) Photo customizing at phixr.com
"...act like men, be strong." (1Corinthians 16:13)