Regarding 1 FAST MF Cadillac Seville: Jon Ward was a builder of all sorts of movie cars, especially stunt ones. He was /is a consummate car nut, even buying the rights to the mid 50's Kurtis racing roadsters (one of which he raced in La Carrera in the 80's)
The Caddy starter with a NASCAR frame to which he modded the Seville body to fit. The back license plate has a switch that drops the plate so a super bright lamp blinds following cars.
I remember seeing posters of the car hanging on the wall of Joe Factor Sales in Burbank (an aircraft salvage/ parts store where most of us bought hardware and AN hoses for our race cars)
As far as I remember that Cadillac never hit the salt flats
His son has gone on to make a reputation for himself building the ICON Broncos, Land Cruisers, retro bad a** old "heaps" with fully upgraded drivetrains
Obligatory pic