I have a 1966 ford f-100, i need to know what rearend i have. The engine has been replaced with a 302and a c-4 trans. It originally had a 352 and a straight-shift. I pulled the numbers off the door. Starting at the topit is. (115-f-f101-b81-c-xx-08) bottom is(04200-172-4000-21). I know one is the axle code, but i cannot find anyone who can help me. Even the ford dealership, they dont know. Any help would be appreciated.

 

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