The Monkeemobile
"Custom car designer Dean Jeffries was hired to create the famous red Monkeemobile. General Motors
furnished NBC with two 1966 Pontiac GTO convertibles, provided
that the words 'Pontiac' or 'GTO' appeared on the finished vehicle. Jeffries
used the stock wheelbase, but pushed back the rear seat, giving the car
a stretched-out appearance. He tilted the windshield up and added an
old-fashioned touring top. A big block engine was dropped in,
making the car powerful enough to pop wheelies. The network,
however, frowned on such a dangerous rod so the stock engine
was put back. Jeffries built two cars in three weeks, one for the episodes
and another for the custom car circuit."