Back in the day, I bought a new 1974 GMC K15 when in my senior year of high school. It had the Chevy 350, HEI, must have been one of the earliest light duty GM trucks with HEI. Plug gap on that was .060", non-catalyst, leaded gas, Q-Jet, SM465.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
