ive called classic performance products (
www.classicperform.com ) many times and asked about there products.... for 30 mins through and hour on the phone! were always very helpfull.... and thats who im going to go with for my suspensien stuff
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www.xframeimpala.com
68 4x4 short fleetside deluxe cab 327 air
56 big window short stepside 235 dual 1 brls
64ImpalaSS 327
70 C10 LWB fleetside custom/10 350/TH350