58 gets a 12 bolt

well,i ran out of options with the original diff,so (even though it will veer away from originality),i picked up a 2wd truck 12 bolt 6 lug 3.08 with posi for $200 on craigslist not just to get the bearings and seals replaced and spring perches rewelded.then,after installation,no more 65mph limit for me!better mpg here i come!

 

Sonds like you have some good highway miles coming to you.
Great to hear you are making progress, enjoy.

 

Andrew,
good for you. The new rear is the same width? What truck did it come out of?

 

thanks ccharr.and, LDO,the new rear is 1 3/4 wider from backing plate to backing plate.(58 1/4 as opposed to 56 1/2).it came out of a 1976 2wd Chevrolet c10.