The Clampettmobile (http://www.tvacres.com/trucks_clampett.htm) was a 1921 flatbed Oldsmobile four-cylinder truck.

On episode No. 210 "The Hot Rod Truck" cousin Jethro (Max Baer) traded the old family jalopy for a new and more powerful hot rod truck (constructed from a 1925 roadster found in Arizona) equipped with a 1969 Olds 442 muscle car engine and painted candy apple red with yellow racing stripes.

The hot rod version of this TV pick-up truck packs an Oldsmobile 442. Inside are 4 bucket seats, a Hurst Shifter and dual S/W tacks. The bed is laminated wood. The driver is protected by two chrome roll bars.

http://www.showrods.com/images/all_kustom_cars2/beverly_hillbillies_sticker2
Teh hawtness.