Flywheel casting 3791021 , originally for ?

[Mr70]

I just sold one of these.
It's actually known as #3791022 by Chevrolet,but has #3791021 cast into it.
It was used up until 1971,at which time it was superceded.
Original Manual Trans.applications:
*1963-68 Corvette & Passenger w/283-307-327 w/o HD clutch.
*1963-64 Passenger w/6cyl. But not Taxi or P/GL.
*1964-69 G-10/20 Series trucks w/6cyl but not P/GL.
*1964 Taxi w/230 only.
*1965-69 Passenger w/230-250,but not HD clutch,P/GL. or Taxi.
*1969 Pasenger w 327-350,but not Police.
*1962-69 Chevy II 153-194 & Chevelle w/HD clutch.
*1964-69 ALL w/230-250-283-307-327.but w/o P/GL.,Taxi or HD Clutch.
*1967-69 Camaro 302 only.
*1970 ALL 6cyl. & 307 w/o P/GL. or Taxi.