72 1/2 4x4 ton rear LIFT blocks factory?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**72 Super** · 10-23-2012, 06:47 PM

Does a 1972 1/2 ton 4x4 have rear lift blocks from the factory? Mine has 2 inch blocks although I know they aren't original. I was going to remove them, but have been told I need some sort of block in there.Is this correct?

thank in advance,
Ray

69GWC · 10-23-2012, 06:56 PM

I know my 69 did not come that way, But when I bought my 2.5" lift I put in new front springs and the 2" blocks in the back.

Kinda sounds like you have 2"' lift blocks, does it set level?
Posted via Mobile Device

**Stocker** · 10-23-2012, 07:23 PM

My K20 has a block above the mounting pad and at the bottom of the spring pack, right where a lift block would go. It's about 1/2" thick. That may be what you've been told you need.

**72 Super** · 10-23-2012, 08:38 PM

It sits about 2 inches higher in the rear. I will look into it and see what I can find out about a block or pad of some kind..

*72longbed* · 10-28-2012, 09:48 PM

Those blocks would have been put in there anytime over the last 40 years by an owner ... but Chevrolet never used blocks in 67-72 leaf spring trucks from the factory. Chevy/GMC dealers would sell you a taller spring pack 'back in the day'. I've seen 67-72's with as many as 11 leaves.

Ford and Dodge have done it (blocks) from the factory over the years.

I've worked on Ford trucks that had 3" blocks fresh off the assembly line.

72

**72 Super** · 10-30-2012, 01:44 PM

Yes I know the blocks were added at some point. I had a friend that thought I may need some sort of thin block or pad between the spring and rear housing. I have confirmed I don't by several members on here. I just need to remove the blocks along with shorter U bolts.

Thanks,
Ray

**72 Super** · 10-30-2012, 01:45 PM

here are the blocks I will be removing.

**Stocker** · 10-30-2012, 02:18 PM

Quote:

Originally Posted by 72 Super

I had a friend that thought I may need some sort of thin block or pad between the spring and rear housing. I have confirmed I don't by several members on here.

Maybe the OEM 1/2" blocks I mentioned above were only used on K20s, and not on K10s.

**72 Super** · 10-30-2012, 05:00 PM

[QUOTE=Stocker;5676430]Maybe the OEM 1/2" blocks I mentioned above were only used on K20s, and not on K10s.[/QUOTE

I believe that is correct. I also talked with someone with a 1 ton and they have a block/pad of some kind too. Slowly leaning a few things here

*72longbed* · 10-30-2012, 06:05 PM

All aftermarket. Show me the factory 'build spec.s' that picture these blocks.

I have never seen them in any factory buld diagrams.

72

**special-K** · 10-30-2012, 08:18 PM

GMC K2500s with the Dana 60 came stock with blocks about 3/4-1",I'm estimating. I have never had a Chevy K/20 with HO52 have a block of any sort.

1972RedNeck · 11-05-2012, 11:20 PM

Quote:

Originally Posted by 72longbed

I've worked on Ford trucks that had 3" blocks fresh off the assembly line.

The early highboy's had 3 1/2" blocks and the later ones had 4" blocks.

kris's66lwb · 11-06-2012, 12:13 AM

My 66 k20 with ho52 had 4 inch blocks factory
Posted via Mobile Device

**special-K** · 11-06-2012, 07:46 AM

Yep,the pre-67s were also Highboys,just like the pre-78 Ferds. It's all about the divorced transfer case arrangement. Except '60s Dodges,they sat lower than Ferd and GMs.

**72 Super** · 11-11-2012, 05:03 PM

I removed the 2 inch lift blocks from my truck. It now sits factory and looks better IMO. I believe the previous owner used it for towing. I just didn't like the rear sitting up higher than the front.

I cleaned and painted the U bolt plates/retainers while it was apart.

I like to thank Rob (BLAZERMAN) and Bill Athey for the information and answering all my questions and I got the new U bolts from Bill Athey (pickupman)

Thanks,
Ray

**Stocker** · 11-11-2012, 05:10 PM

Glad it worked out and you got the look you wanted. If the truck will ever get off-road, you may want to trim the excess length off the u-bolts. It's too easy to snag them on something and bend 'em over.

BLAZERMAN · 11-11-2012, 09:47 PM

Glad you got her back together Ray...now quit teasing and show some pics of that Beauty!!

**72 Super** · 11-11-2012, 09:59 PM

Quote:

Originally Posted by Stocker

Glad it worked out and you got the look you wanted. If the truck will ever get off-road, you may want to trim the excess length off the u-bolts. It's too easy to snag them on something and bend 'em over.

I like it a lot better this way. I doubt it will ever see any serious off road use, but I may trim them at some point just incase.

**72 Super** · 11-11-2012, 10:05 PM

Quote:

Originally Posted by BLAZERMAN

Glad you got her back together Ray...now quit teasing and show some pics of that Beauty!!

Here you go!

Here are a before and after picture. Not the best picture in my driveway. I will take some better ones and I want to do a write up for the board, just haven't got there yet.

10-23-2012, 06:47 PM	#1
72 Super Senior Member Join Date: Jul 2001 Location: Hyattsville, Maryland Posts: 3,678	72 1/2 4x4 ton rear LIFT blocks factory?? Does a 1972 1/2 ton 4x4 have rear lift blocks from the factory? Mine has 2 inch blocks although I know they aren't original. I was going to remove them, but have been told I need some sort of block in there.Is this correct? thank in advance, Ray __________________ 72 Cheyenne Super (Purchased new by my parents in August of 71) Black and White

10-23-2012, 06:56 PM	#2
69GWC Registered User Join Date: Jun 2012 Posts: 1,089	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? I know my 69 did not come that way, But when I bought my 2.5" lift I put in new front springs and the 2" blocks in the back. Kinda sounds like you have 2"' lift blocks, does it set level? Posted via Mobile Device

10-23-2012, 07:23 PM	#3
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,543	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? My K20 has a block above the mounting pad and at the bottom of the spring pack, right where a lift block would go. It's about 1/2" thick. That may be what you've been told you need. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

10-23-2012, 08:38 PM	#4
72 Super Senior Member Join Date: Jul 2001 Location: Hyattsville, Maryland Posts: 3,678	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? It sits about 2 inches higher in the rear. I will look into it and see what I can find out about a block or pad of some kind.. __________________ 72 Cheyenne Super (Purchased new by my parents in August of 71) Black and White

10-28-2012, 09:48 PM	#5
72longbed Account Suspended Join Date: Jun 2003 Location: PA Posts: 1,411	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? Those blocks would have been put in there anytime over the last 40 years by an owner ... but Chevrolet never used blocks in 67-72 leaf spring trucks from the factory. Chevy/GMC dealers would sell you a taller spring pack 'back in the day'. I've seen 67-72's with as many as 11 leaves. Ford and Dodge have done it (blocks) from the factory over the years. I've worked on Ford trucks that had 3" blocks fresh off the assembly line. 72

10-30-2012, 01:44 PM	#6
72 Super Senior Member Join Date: Jul 2001 Location: Hyattsville, Maryland Posts: 3,678	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? Yes I know the blocks were added at some point. I had a friend that thought I may need some sort of thin block or pad between the spring and rear housing. I have confirmed I don't by several members on here. I just need to remove the blocks along with shorter U bolts. Thanks, Ray __________________ 72 Cheyenne Super (Purchased new by my parents in August of 71) Black and White

10-30-2012, 01:45 PM	#7
72 Super Senior Member Join Date: Jul 2001 Location: Hyattsville, Maryland Posts: 3,678	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? here are the blocks I will be removing. Attached Images __________________ 72 Cheyenne Super (Purchased new by my parents in August of 71) Black and White

10-30-2012, 05:00 PM	#9
72 Super Senior Member Join Date: Jul 2001 Location: Hyattsville, Maryland Posts: 3,678	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? [QUOTE=Stocker;5676430]Maybe the OEM 1/2" blocks I mentioned above were only used on K20s, and not on K10s.[/QUOTE I believe that is correct. I also talked with someone with a 1 ton and they have a block/pad of some kind too. Slowly leaning a few things here __________________ 72 Cheyenne Super (Purchased new by my parents in August of 71) Black and White

10-30-2012, 06:05 PM	#10
72longbed Account Suspended Join Date: Jun 2003 Location: PA Posts: 1,411	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? All aftermarket. Show me the factory 'build spec.s' that picture these blocks. I have never seen them in any factory buld diagrams. 72

10-30-2012, 08:18 PM	#11
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? GMC K2500s with the Dana 60 came stock with blocks about 3/4-1",I'm estimating. I have never had a Chevy K/20 with HO52 have a block of any sort. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

11-06-2012, 12:13 AM	#13
kris's66lwb resident wrencher Join Date: Dec 2006 Location: ramona california Posts: 720	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? My 66 k20 with ho52 had 4 inch blocks factory Posted via Mobile Device

11-06-2012, 07:46 AM	#14
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? Yep,the pre-67s were also Highboys,just like the pre-78 Ferds. It's all about the divorced transfer case arrangement. Except '60s Dodges,they sat lower than Ferd and GMs. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

11-11-2012, 05:03 PM	#15
72 Super Senior Member Join Date: Jul 2001 Location: Hyattsville, Maryland Posts: 3,678	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? I removed the 2 inch lift blocks from my truck. It now sits factory and looks better IMO. I believe the previous owner used it for towing. I just didn't like the rear sitting up higher than the front. I cleaned and painted the U bolt plates/retainers while it was apart. I like to thank Rob (BLAZERMAN) and Bill Athey for the information and answering all my questions and I got the new U bolts from Bill Athey (pickupman) Thanks, Ray Attached Images __________________ 72 Cheyenne Super (Purchased new by my parents in August of 71) Black and White

11-11-2012, 05:10 PM	#16
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,543	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? Glad it worked out and you got the look you wanted. If the truck will ever get off-road, you may want to trim the excess length off the u-bolts. It's too easy to snag them on something and bend 'em over. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

11-11-2012, 09:47 PM	#17
BLAZERMAN Currently Blazerless Join Date: Apr 2000 Location: St. Joseph Mo. Posts: 4,826	Re: 72 1/2 4x4 ton rear LIFT blocks factory?? Glad you got her back together Ray...now quit teasing and show some pics of that Beauty!! __________________ 1972 C/30 133" W.B. C&C 1970 GMC 3500 157" W.B. single wheel C&C



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