Leaf Spring Dimension for a 12bolt - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SCOTI · 03-11-2016, 09:42 PM

Does anyone have a 73-87 truck 12bolt (10bolt would work to) that they can measure the distance between the leaf spring mounting pads on the housing @ the centerline of each pad?

Shady Rascal · 03-11-2016, 10:27 PM

It's hard to get it down to the 1/16" of an inch since the pumpkin obstructs the tape measure, but this is real damn close.

SCOTI · 03-11-2016, 11:12 PM

Thanks! Looks like ~43" is my number.

74CustomK20 · 03-12-2016, 08:26 AM

If I remember 1\2 and 3/4 tons are 42-1/2" and 1 tons are 40-1/2 give or take a 1/2. Found this out the hard way going to a 1 ton frame from a 1/2 ton

03-11-2016, 09:42 PM	#1
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Leaf Spring Dimension for a 12bolt Does anyone have a 73-87 truck 12bolt (10bolt would work to) that they can measure the distance between the leaf spring mounting pads on the housing @ the centerline of each pad? __________________ 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.*

03-11-2016, 10:27 PM	#2
Shady Rascal Registered User Join Date: Feb 2016 Location: Weatherford Texas Posts: 306	Re: Leaf Spring Dimension for a 12bolt It's hard to get it down to the 1/16" of an inch since the pumpkin obstructs the tape measure, but this is real damn close.

03-11-2016, 11:12 PM	#3
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: Leaf Spring Dimension for a 12bolt Thanks! Looks like ~43" is my number. __________________ 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.*

03-12-2016, 08:26 AM	#4
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Re: Leaf Spring Dimension for a 12bolt If I remember 1\2 and 3/4 tons are 42-1/2" and 1 tons are 40-1/2 give or take a 1/2. Found this out the hard way going to a 1 ton frame from a 1/2 ton __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.

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