71 Mach 1 302 which rearend???

[71 Mach]

Hi, I have just about finished my 71 Mach restomod project. Its has a Fuel injected 347 with complete BBK intake setup, Powerdyne Supercharger and built
C4 trans with shft kit and hammer shifter. Now I need some advice on what to do with the rearend. I hit the gas 1/4 throttle and its one wheel wonder time with no traction at all. I want 3.73 so I keep some drivabilty. Which rearend is in there stock and can I build off that. any help would be great.

Thanks, Jesse

 

[torino420]

If it came with a 302 originally then its an 8". Unless someone swapped in the 9.
Although Im not sure any mach 1's came with a 302 though.
Here's more info on how to idetify what you got: http://www.kevinstang.com/Ninecase.htm

 

[CraigMBA]

Aren't all 1971-1973's 9"?

 

[Stanger007]

My '72 Mach 1 with a 302 has a 8".

 

[CraigMBA]

My '72 Mach 1 with a 302 has a 8".

I'll be darned. I learn something new every day.

 

[Gud T.B. Blown]

I believe only the 351's or better came with 9" rears.