rear c-10
 

i have a 77 c-10, did they come with the ten bolt 8.5 rear? its open diff and im looking at possible upgrades to have or make a posi rear.

thanks,
chris

Re: rear c-10
 

77 came with a 12 bolt.

Re: rear c-10
 

powertrax..drop in unit...

http://www.jegs.com/i/Powertrax/754/...oductId=744476

Re: rear c-10
 

Because of how often these trucks were pieced together over the years, I'd recommend getting under the truck and counting the bolts around the differential cover to see what you had...