1966 Plymouth Valiant Signet Hardtop

I have no problems with my torsion bars, I put in 1.03 pst bars, urethane lower bushings, tubular uppers, new leafs out back and mine handles fine. I did add frame connectors and dumped the 7.25 out back for an 8.75. even my mild slant could kill the 7.25. im running 17" steelies, dumping the 14"-15" tires made a big difference in how the car drives. I will second the crate engine or even a rebuilt one. even a decent magnum5.2 rebuild will put out more than that 273. in the end its your car, build it how You want and Drive the crap out of it!