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**Bob B.** · 11-06-2006, 01:42 AM

Big Block TH 400 shorts had the high hump, but I think the long beds used the low hump. Something about raising the transmission to correct the driveshaft angle?

11-06-2006, 01:42 AM	#14
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,393	Re: Original Big Block Truck? Big Block TH 400 shorts had the high hump, but I think the long beds used the low hump. Something about raising the transmission to correct the driveshaft angle? __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.