I bought a '77 Fury Police package 4-dr. Drove it for years, it was a fantastic car. 440hp, hi-stall converter, 1st gear block, 4 pinion planitaries, trans cooler, 100amp alt., airconditioning blockout, certified 140mph speedo, hvy duty brakes, hvy duty suspension, Goodyear 6 ply Flexten radials, spotlites, hvy duty cooling package, 9-1/4 rear with 2.94 gears, and things I've forgotten about over the years.
I also couldn't leave well enough alone, I installed a MP 284 cam, 1-3/4" headers, H pipe and duel turbo mufflers, recurved the distributer, rejetted the carb. I would easily bury the needle. It rode nicer at 100+ than at 55, the speed limit at the time. I never got a ticket driving that car, they all just waved. Dave