Well, an easy way to get half way close is to talk with the track champ (and a few other front runners). Convert their shivvvy front spring rates into wheel rates. ( The easy way to do this is to just divide his numbers by 4 - close 'nuff for you). The MP Tech line guys are mostly drag racers, but they CAN look up the wheel rates on the torsion bars that they sell. Ask 'em for ALL of the wheel rates. (And ask 'em why they don't just put these numbers in the catalog?!?)
The Mopar Performance leafs may put you right in the ball park. A lot of people have real good luck with them, even a few shivvvy freaks. IMCA can't say thay aren't "factory" leafs, either. <grin> Or you can call up Landrum, Afco, Flexiflyer or Flexiform. Tell them your percentages, weights, track conditions... and they will help your buy what they think will work for you.
That #24, #25, #14 ect. are all old leaf spring numbers that Chrysler used to sell during the 64 - 70's NASCAR Championship years. A lot of those same leafs and torsion bars were sold for use on the Chrysler Kit car. That was kind of like an IMCA Stockcar (Only with a quick change & a 4 barrel 355 Mopar smallblock).
Try to keep your overall weight down when building your car. IMCA has no minimum weight for hobbystocks. A lot of the shivvvy guys lie about what their car weights. (Had more that one tell me that their car weighed less than a IMCA Modified!) If your car is under 3000# without you in it, you are in good shape.
Claim one of those big School Bus/Grain Truck Rottenchester carbs off somebody you don't like. Make sure you have the BIG one. (1/2 inch between dividers at the top). I think they have 1 9/16" butterflies.
Hey, GOOD LUCK!
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