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Mod | | | Forums66 Topics128,114 Posts1,056,610 Members48,450 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Oct 2009 Posts: 12 New Guy | | New Guy Joined: Oct 2009 Posts: 12 | I have been in the search for a 4.56 or higher rear gear. I was reacenly offered by Bill a rear from his K20 parts truck. He is sure the front was a Dana and the rear is a 4.56 Posi Detroit. My question is 2 things, is or will it fit a HO72 and secondly will it fit my DRW axle.
Thanks Everyone for your help to this new young bolter!
Chevrolet 1957 3800 dually flat bed.
| | | | | Joined: Mar 2004 Posts: 874 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 874 | If it's an Eaton with the drop out center section, yes it will fit your housing.
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | What year K20? If it's a '72 or older, it'll work. If it's '73 or newer, it will not, as they used the Corp 14 bolt. Unless you're looking to swap the entire differential, then you could use it.
Bill Burmeister
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