Up for Buy-It-Now is a new old stock transmission spark control switch, GM part number 3996286. According to my GM Manual, this is used on the following models and years:
1973 Oldsmobile...6 cylinder, 3 speed, Standard Transmission
1974 Oldsmobile...Body code X Omega, 3 speed, Standard Transmission
1972-1974 Corvette..4 speed
1971-1975 Chevrolet, All w/ 3 & 4 speed Transmission
1976 Chevrolet..Body code H Vega & Monza (140-1 BC) 4 speed
1971 Chevrolet Truck...G-10 thru 30 Van (6 cylinder)
1972 Chevrolet Truck..All, Blazer
1973-1974 Buick..Body code X Apollo, (C.T. 3 speed), L-6 engine
As always, please refer to your own individual manuals to be certain this is the part you need before bidding. The switch is in brand new, never used condition and is free of any damage. Thanks for looking!!!