What kind of rear end do I have???
 

I have a 1970 C-20 shortie with a utility bed. Judging by the dark green around the emblems, door jambs, etc... This is an old phone company truck. I would like to know what the rear end may be... gear ratio etc??? The truck is a manual transmission and I'm not sure what the original engine would have been. The truck currently has an inline 6, but the fenders say 8/350 below the C-20 emblem.

Re: What kind of rear end do I have???
 

That is a 12 bolt axle,1/2 ton variety!

Re: What kind of rear end do I have???
 

Did they make 1/2 ton 6 bolt pattern rearends???

Re: What kind of rear end do I have???
 

yep

Re: What kind of rear end do I have???
 

I would say you have the wrong emblems on your truck. All 1/2 tons were 6 lug thru 70. And no C-20 shortbeds were ever built. Your truck appears to be a 1/2 ton.

Re: What kind of rear end do I have???
 

Best "guess" on rear axle ratio is a 3:73 to 1.You can check the SPID in the glovebox for a option or since it looks like it's up in the air you can rotate the driveshaft and count wheel revolutions.One turn of the driveshaft should turn the wheel 3 times or almost 4. 3:08-3:73-4:11 are possibilities.The 3:73 would be standard with a manual.There is also a code stamped on the axle,pass side IIRC that will be a number that can be croossreferenced.You'll have to crawl under there and wir brush it well to see it.

Re: What kind of rear end do I have???
 

Here's a thread on axle ratio count.
http://67-72chevytrucks.com/vboard/s...d.php?t=532388

Re: What kind of rear end do I have???
 

Re. emblems. The paint that has peeled off is a different color than the truck's interior. More that likely fenders were damaged and swapped.

Re: What kind of rear end do I have???
 

Thanks for all the input! 2 posts on this site and I've already learned a lot! Love it!

Re: What kind of rear end do I have???
 

Love that bed.