Join Date: Apr 2006
Location: Armstrong B.C. Canada
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my opinion, never stack blocks and never use blocks in the front.
blocks increase the leverage on your leaf springs, when you have a space where there is leverage, it can open up and spit out the blocks. guys have done both, stack blocks and used blocks in the front, but in my opinion if they haven't had any problems they are lucky, that doesn't mean it is safe.
1978 Ford Bronco
ZF-5 NP 205 10.25 rear Dana 60 front
Denny T fuel pin 366 governor spring
HX 35 turbo BD exhaust brake
1990 F-350 Crew-Cab Short Box XLT 4x4
170cc stage 1 injectors, superduty intercooler, flowmaster 3" down pipe, 4" exhaust, 6637 filter, 17* HPOP, Wildman tunes, build E4OD, 5 disc billet converter, Irate E-fuel, 1.0 exhaust housing, WW2, CCV mod, homemade RSK