I can't think of the name but there was a family that owned a Pontiac dealership on the east coast of the US. One of the car magazines did an article on them back in the 80's I think and it seems to me they had put a shaker on a GP from the early 80's. Seems to me they also ran a 400 Poncho engine in that car.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)