Actually, I think this
is the same vehicle that Amsterdam posted.
It is one of two pickup conversions made by Dick Troutman, who (with Tom Barnes) was known for building sports cars for road racing.
He apparently went to Aase Brothers in Anaheim, California, (a salvage yard specialising in Porsches) to buy a 914-6 they had for sale, and mentioned to one of the Aase brothers that he was going to make a pickup out of it. Dave Aase asked if he would make a second pickup out of a 914 of theirs, and it appears that that is the puzzle car.
The Aase Brother’s used the 914 pick-up as a shop truck to transport all sorts of parts for their dismantling business. Dave remembers that a VW magazine did a feature on the pick-up, and had a full page spread with Renee Vaughn (adult entertainer) posing on the car. The pick-up was painted brown at the time and had Aase Brother’s business advertised on the rear quarters.