CONTROL FREAKS IFS A-Body 440 setup

72's set up is definitely performance oriented and should work equally well in both of your BB cars. The B body torsion bars are longer and have a bit more "twist-ability" to them due to the added length so are about a step softer, ie. to get equivalent rates, a 1.06 in an A body would roughly equate to a 1.12 in a B body. On these old cars think "package" when ever your considering any upgrade. Everything needs to work in harmony. Have a goal and select your components to meet the goal. Note that every aspect of the suspension is addressed in 72's "package", (except sub frames and torque boxes which I'm sure he ommited by mistake). It will all work together to get you the results your after. FABO and FBBO are great resources for advice and info.