Which longacre for bump steer

All components are new. Can't remember alignment specs but very similar to newer mustang.
Firm feel stage 2 box
Cap upper arms
.96 torsion bars
Firm feel sector support
Qa1 single adjustable shocks
Front stabilizer bar but no rear
Car is a 74 barracuda so I believe it has the good spindles ?
Tires on front are 245 so that might be contributing?