My aunt had a car very similar to that Wildcat, a 1966-67 Oldsmobile Starfire with the police interceptor engine, Turbo-Hydramatic 3 speed automatic. My uncle had to special-order it like that.
One night, on a long straight road, I started in "Drive" from a dead stop, and held the accelerator to the floor. It shifted from first to second at 65 mph, and from second to third at 105 mph, I kid you not. I don't know how tall the gears were in the differential, but they must have been the maximum that GM offered that year.
I chickened out at about 130 mph, but it still had A LOT left. I bet it would have done 150-160.
Probably cost $5K brand new.