33 hotrod - what rear spring rate?

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33 hotrod - what rear spring rate? or is it adjustment?
using koni coil overs
setting is 1 turn in
car does not take road irregularities well "jouncy" in rear
rear does not stick when pushed ... understeer
245 45 18 tires all around
front koni's are also 1 turn in

any ideas?

[JWilkins]

Changed the shocks to QA1. The Koni's were too stiff on their softest setting and need to be removed to adjust stiffness. 400 #/in. springs in front, 225/475 #/in. progressive springs in rear. Rides nice with shocks fairly soft, can always increase stiffness.

John

[Tim Whittaker]

Ditch the Konis. Dan Ruth can get you what will actually work.