Re: 76 GMC CCLB Dually, The Blue Ox
There's no need to pancake or modify the crossmembers on these trucks unless you intend to bodydrop. The crossmember should be even with the bottom of your frame rails. I Z'd my frame up 4" only because I cut 4" off the bottom of my rails. Before the bodydrop, I planted the crossmember at the same time as the rails...
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