Hello, Im restoring my 1966 oldsmobile 442 with 400 engine, but I neet some informations:

1. I know I have a muncie transmission but I dont know if is the M20, M21 or M22,??

2. When I buy the car the guy tell me that the car have a posi traction, but when a mechanic saw the rear axle he said, I dont have a posi traction, the question is all the 442 1966 have the posi? how i can be sure if the car have or not posi?

3. did anyone know the gear ratio of the car?

4. If I want a better street ride is better to change the gear ratio? wich one?

thank you

Salameh
Guatemala City, Central Amercia