Something to try.
LF 275 RF300
LR185 RR200 (225 if coupe)
Get the left wheels as close to the frame as legal. 6 1/8 on the LR to the drum. LF control arm from center of ball joint to center of heim should be around 14 7/8 - 15 inches. Right is 17 3/16.
47.5% cross
Max length on left, 72 7/8 on right side.
Get rear end as close to front of the car as possible (measure 5 1/2 from the back of the tube to the back of the upright frame piece in the back. Both sides.
LF Lower control arm should angle towards the front of the car by tenth of an inch (1/2 inch spacer). RF Lower should be the same distance across the cross member (1/4 inch spacer).
Camber LF 3.5, RF 5 7/8
Caster LF 1.75, RF 4.25
Tire pressures
LF19 RF25.5
LR16.5 RR 25
Good Luck. Have had great success with this setup.
OZZIE