Hi All, I'm thinking of beefing up my '75 . It has a factory 454 that I want to build a lil bit. Question is, what kind of rear end is in it now, and do I have to think of maybe beefing it up also? Thanks for any help, Jack

Have you tried looking at the codes on the axle? If you can post the codes I can tell you exactly what it is. On mine they are 2.73 but i have a 350