Kinda figured there are rules about the carb, it was an old trick.
You are going to need to have the pistons come out of the block, meaning a positive deck.
Need to run the piston clearance close to the piston head.
Might be able to switch out gears in that 3 spd trans, the 2nd to 3rd gear change is a killer! RPMs drop off too much.
Most likely need an air bag in the right rear coil spring to launch straight.
Need to change the throat angle & open it up in the cyl head for max flow.
Maybe profile the intake port boss & try to make it look as cast/stock looking.
MBHD