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I need to increase open spring presure from 215lbs to 250. Can I shim my new stock ones (2.8 iron heads) or should I get something aftermarket? Shim thickness suggestions? Thanks
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The stock iron head springs are junk. Plus as they age they get weaker there is no telling what your springs are actually rated at today without testing them. Buy new springs.1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
Because... I am, CANADIAN -
yeah, pretty sure you won't be able to shim those stock springs without coil bind to suit your needs. then at the risk of possibly breaking your old weaker springs.Andy
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fastest 1/8: 10.19@ 67.17
fastest 1/4: 16.16@ 82.70
62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.
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