[1] Montgomery began drag racing as a teen,[2] learning mechanical skills at the AC Delco plant in Dayton, Ohio, he would later use to build the supercharger on his 390 cu in (6 L) Cadillac; he would mate a Cragar 4-71 manifold to a GMC 6-71 blower, and hand-fabricated the drive pulleys.
[16] Changing classes, and to supercharged 427 SOHC power in AA/G, for 1966, Montgomery again won the national title at Indianapolis, turning in a pass of 9.58 seconds at 153.58 mph (247.16 km/h).
[24] While Montgomery was unimpressed with the Shotgun engine, it nevertheless powered the Mustang to a Super Eliminator win at that year's Nationals, beating the AA/A roadster of Ron Ellis.
[25] The Mr Gasket- and Chapman Race Products-sponsored Mustang, now with twin Schwitzer turbochargers, would give Montgomery a class win again at the Nationals in 1971, with an 8.50 second pass.
[27][28] He would close his regular racing career in 1975, as the popularity of gassers faded, switching to driving a turbocharged Ford Pinto, but only occasionally, until 1986.