I do not know what rear end I have in my 57, but it seems very low. The rpms are at 3000ish at 65. I would like to do a 3.73 swap I think because it would still be relatively low, but be little easier at highway speeds. Regardless of what ratio I pick (I'm not looking to do it that soon), I am curious as to what the process is to change it. Would I just change this http://www.summitracing.com/parts/SUM-741001/ ?

and if so, is that something I should get a shop to do?

Would it be easier to change the whole differential or the whole rear axle using a junkyard doner?

Just curious

Alex
57' 3100 (The Bondo Bandit)
Bad rust and worse wiring, but so much fun.