For sale is a NOS 3978759 Muncie M-22 Rockcrusher mainshaft. I have had this since the mid 80's and is in mint condition in the original GM tube.
The Pontiac application is 1971-74 all 4spd M-22 Muncie. The part number crosses over to all GM car lines except Cadillac. The item "1969 1970 1971 1972 GTO 442 CHEVELLE CAMARO FIREBIRD NOVA NOS M-22 MAIN SHAFT SS" is in sale since Sunday, December 27, 2020.This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Transmission & Drivetrain". The seller is "ravjudge" and is located in Le Mars, Iowa. This item can be shipped to United States.