Another rear end question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**leddzepp** · 02-28-2022, 10:46 PM

Will a 2wd 73-up leaf sprung rear end (1/2 ton, 12 bolt) bolt right up to a 67-72 2wd frame? Are the leaf perches the same distance apart and do the shock mounts line up? Thanks in advance.

68Gold/white · 03-01-2022, 12:04 PM

I would like to know, as well, thanks for a good question...

Moser lists axles shaft lengths the same for all 12 bolts from 1970 till 1982 (when they quit making 12 bolts for pickups (I think?...) The axle shafts are ALL listed as the SAME length. Supposedly info I've read here, the axle length wsa not the same for all of 1970...

Anyhoo. My point is the axles were same length, supposedly. It would be cool if 73-up rears would bolt into 67-72's with leaf springs!!!!
Being CHevrolet/GMC its possible!!!! It would not be likely with other makes...

SCOTI · 03-01-2022, 12:19 PM

IDK 100% if they're an exact match @ the pads as far as dimensionally but I know of a couple of guys that swapped 73-87 housings under their trucks (4x4's).

I might be able to access the original 12bolt from my old 74 to get a dimension @ the center of the spring pads if needed?

02-28-2022, 10:46 PM	#1
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,022	Another rear end question Will a 2wd 73-up leaf sprung rear end (1/2 ton, 12 bolt) bolt right up to a 67-72 2wd frame? Are the leaf perches the same distance apart and do the shock mounts line up? Thanks in advance. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul

03-01-2022, 12:04 PM	#2
68Gold/white Registered User Join Date: Sep 2011 Location: Ark City, Kansas Posts: 3,387	Re: Another rear end question I would like to know, as well, thanks for a good question... Moser lists axles shaft lengths the same for all 12 bolts from 1970 till 1982 (when they quit making 12 bolts for pickups (I think?...) The axle shafts are ALL listed as the SAME length. Supposedly info I've read here, the axle length wsa not the same for all of 1970... Anyhoo. My point is the axles were same length, supposedly. It would be cool if 73-up rears would bolt into 67-72's with leaf springs!!!! Being CHevrolet/GMC its possible!!!! It would not be likely with other makes...

03-01-2022, 12:19 PM	#3
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,031	Re: Another rear end question IDK 100% if they're an exact match @ the pads as far as dimensionally but I know of a couple of guys that swapped 73-87 housings under their trucks (4x4's). I might be able to access the original 12bolt from my old 74 to get a dimension @ the center of the spring pads if needed? __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*



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