I can substitute main and cluster gears to make a M-20 if you would rather have that. Here is what is included all NOS.
NOS 357242 4TH GEAR close ratio. NOS 357236 CLUSTER GEAR close ratio. NOS 357228 REVERSE GEAR big. NOS 357231 REVERSE GEAR small. NOS 3831762 REVERSE IDLER GEAR.NOS 3915020 FRONT BEARING RETAINER. NOS 3834739 REVERSE IDLER FRONT GEAR WASHER. NOS 3864860 (2) COUNTER GEAR PIN WASHER. NOS 3834739 REVERSE GEAR IDLER FRONT WASHER. NOS 3774909 REVERSE GEAR IDLER REAR WASHER. NOS 591150 4TH GEAR BEARING RETAINER NUT. NOS 9419248 MAIN SHAFT GEAR ROLLER BEARING. NOS 907474 MAIN SHAFT ROLLER BEARING. NOS 1243402 TAIL SHAFT SEAL. NOS 3917763 OVERHAUL GASKET SET. There are very minor stains in a couple parts but absolutely nothing to cause any problem. The item "1968 1969 1970 1971 1972 GTO CHEVELLE CORVETTE CAMARO FIREBIRD 442 GS NOS MUNCIE" is in sale since Friday, October 29, 2021. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Transmission & Drivetrain\Other Transmission & Drivetrain". The seller is "ravjudge" and is located in Le Mars, Iowa. This item can be shipped to United States.