Hell, I'm working on a 72 Duster with an inclination more towards street performance rather than Drag strip. The car was a 225 slanty with a 3 speed on the column, but with lots of help, it is now a 360 4 speed. Much of the car is a mix and match of parts from many different cars. I even have an 8 3/4 axle from a 68 Coronet!
The slant six torsion bars look barely thicker than the fuel line, so I bought some 1" torsion bars at a swap meet. I'm going to swap those in after I pull the engine to paint the engine bay. Is there a recommended leaf spring rate to compliment the added stiffness of these torsion bars? I'm not looking for anyone to do all the thinking here, I was just looking for some direction. Is it a matter of calculating a spring rate increase of the torsion bars and then adding some additional leafs to the rear? Thanks for any help.
Jeff