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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!
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| | | | Joined: Nov 2007 Posts: 128 'Bolter | | 'Bolter Joined: Nov 2007 Posts: 128 | I have a line on a 65 C20 for sale, was really wanting a C10 but this truck is a real descent truck, 100% original, complete & running/driving. Is there a ring & pinion or center section swap to have a more highway friendly ride or would it have to be a whole axle swap? Also what were the gear choices in the C20's? It also has the 16" split rims, are there a particular set of 8 lugs I should be looking for? I dont want to go real wide. Thanks
Last edited by Peggy M; 11/06/2023 10:05 PM. Reason: added more info to the title
| | | | | Joined: Nov 2021 Posts: 1,258 'Bolter | | 'Bolter Joined: Nov 2021 Posts: 1,258 | Once you know what rear end it has you can order what you need to bring it down. Might need to buy a center section but I would think you could get down to a 3.73 easily.
Wheels are easy. 8.lug with a standard offset. Actually any of the big 3 wheels will fit I think.
Last edited by Ferris Bueller; 11/07/2023 1:54 AM.
| | | | | Joined: Feb 2004 Posts: 29,878 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,878 | The 4.10 center section that was used behind automatic transmissions is a direct swap into the Chevy corporate housing. Those gears are not being produced new by anyone, and OEM is extremely scarce and pricey. The usual ratio for a stick shift C20 is a 4.56. There's a Dana type 60 8 lug rear that was used by GMC that's also pretty scarce, but there are all sorts of aftermarket ratios available for that one. I've got one of them under a 59 Suburban with a 3.73 gearset for a Ford, in a GMC housing.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2007 Posts: 128 'Bolter | | 'Bolter Joined: Nov 2007 Posts: 128 | Thanks for the replies. "Hotrod Lincoln" just spoke to a guy today who has one of the 4.10 center sections available, I'll have to see tomorrow what he'll want for it. On a side note I have a friend who has a Brownie OD auxiliary box available, that could be an interesting alternative. | | | | | Joined: Nov 2007 Posts: 128 'Bolter | | 'Bolter Joined: Nov 2007 Posts: 128 | The guy I mentioned previous has the complete 4.10 rearend from a '72 for $500, is that good, bad or average priced? | | | | | Joined: Feb 2004 Posts: 29,878 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,878 | If you don't want it at that price, I'll be glad to come and get it! Be sure to give him a big wet kiss when you pick it up! Can you post a pic of the Brownie? I might want to make an offer on that, if it's the right size for a medium duty truck.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2007 Posts: 128 'Bolter | | 'Bolter Joined: Nov 2007 Posts: 128 | I take it thats a real good price, especially for the whole axle  | | | | | Joined: Nov 2007 Posts: 128 'Bolter | | 'Bolter Joined: Nov 2007 Posts: 128 | I ended up with both, gotta get em while the gettin's good. The aux box is a Spicer 3spd, OD/Direct/UD, about the size of an SM420. Not sure how to post photos.
Last edited by 1955first6500; 11/10/2023 3:41 AM.
| | | | | Joined: Dec 2015 Posts: 2,063 Big Bolt Forum Moderator | | Big Bolt Forum Moderator Joined: Dec 2015 Posts: 2,063 | does your aux box have a park brake on the back of it? | | | | | Joined: Nov 2007 Posts: 128 'Bolter | | 'Bolter Joined: Nov 2007 Posts: 128 | | | |
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