It is the MegaCycle, AKA Biketruck, AKA Captain Pepi's Motorcycle
and Zeppelin Repair, but it was built by Ed Roth.
That's the ticket!
Buick V6 engine, independent front suspension with unequal-length A-arms and coil springs, live rear axle with coil springs and a lateral stabilizer bar, and four-wheel hydraulic drum brakes. Deigned around and used to haul a Harley XLCH, until Roth bought a custom show-winning custom Triumph motorcycle.
Roth later bartered the vehicle to a local salvage yard to use as a display for a year, in return for the rear half of a VW he needed to build a trike. When he went to get it back, he was angered to find the junkyard owner was letting his dog use it as a dog house.
One more AKA - "Missing Link"