CT Wanted to Buy 66 K20 Original Rear Spring Blocks

[Joe P]

Hi there! New to the site, working on a 66 K20 that was trash and slowly bringing her back. I want to put the original rear spring blocks in - My truck had PO blocks that were, well, lets be kind and say "not original". I am in CT. Anyone have a pair to sell?

[Harlowhead1972]

Hi Joe. I believe I still have a clean set from a 1966 GMC K20. I will post pics later today. Thanks, Harlow

[Joe P]

Originally Posted by Harlowhead1972

Hi Joe. I believe I still have a clean set from a 1966 GMC K20. I will post pics later today. Thanks, Harlow

Thanks Harlow! Looking forward to the photos!

[Harlowhead1972]

Hi Joe. Sorry, it looks like I only have the front blocks left. I am working on getting another 64-66 vintage K20. I will let you know if I get it and if the rear blocks are intact. Thanks, Harlow

[Joe P]

Originally Posted by Harlowhead1972

Hi Joe. Sorry, it looks like I only have the front blocks left. I am working on getting another 64-66 vintage K20. I will let you know if I get it and if the rear blocks are intact. Thanks, Harlow

Thanks for looking, Harlow. I have the front blocks in good shape, just need the rears. Appreciate your courtesy!

[jdl71]

Are you wanting the lift blocks?

[Joe P]

Originally Posted by jdl71

Are you wanting the lift blocks?

Yes still looking for a pair, thank you!

[jdl71]

I didn't realize some came with front blocks also.

[Joe P]

Originally Posted by jdl71

I didn't realize some came with front blocks also.

I'm not sure if they did - My truck does not have lift blocks up front, but does have a couple of blocks on top of the springs, more like "Bump Stops"

[Joe P]

I am looking for original rear blocks. This is what I have today...

[jdl71]

My rear lift blocks look much different

[Joe P]

Originally Posted by jdl71

My rear lift blocks look much different

Yes, these are not original. The PO added them. I have not been able to find originals so I may just reassemble with these blocks and change them out when an original set comes along.

[Joe P]

Still looking...

[SmirchIs#1]

Originally Posted by Joe P

Still looking...

Im not real familiar with the 60-66 group of trucks.I have a 61 K 20 for parts.I looked at the rear mounts.They look like a combination lift block and lower shock mount all in one.If this sounds correct,I'll take pics.

[Joe P]

Originally Posted by SmirchIs#1

Im not real familiar with the 60-66 group of trucks.I have a 61 K 20 for parts.I looked at the rear mounts.They look like a combination lift block and lower shock mount all in one.If this sounds correct,I'll take pics.

Thank you yes. It may be correct. This is the block that goes between the bottom of the spring and the axle perch. The photos that I have seen show what looks to be similar to an I think it incorporates a bump stop too. Thank you!

[Joe P]

Here are a few photos of what I think are original blocks

[Dsuper5]

Up for grabs:

[Joe P]

That’s it! How do I make them mine?

[Dsuper5]

Well lets see, my Garage needs a new roof....my tires are bald....!

PM me with your contact info and i ship them out!
Cheers Eddy

[Joe P]

Originally Posted by Dsuper5

Well lets see, my Garage needs a new roof....my tires are bald....!

PM me with your contact info and i ship them out!
Cheers Eddy

Thanks Eddy. I left a PM...

[1971 GMC SHORTY]

Wow When I got My 1 st 4x4 66 GMC I Use to Think What Were Thet Thinking With Those Strange Blocks

[Joe P]

Originally Posted by 1971 GMC SHORTY

Wow When I got My 1 st 4x4 66 GMC I Use to Think What Were Thet Thinking With Those Strange Blocks

Yes, they are strange for sure. I guess that a plain rectangular block is substantially heavier. Perhaps the designers wanted to reduce the weight a little. Anyway I prefer the original ones because they are "original".

[aerotruk63]

I have a pair without the shock mount on them.

[Joe P]

Originally Posted by aerotruk63

I have a pair without the shock mount on them.

Thanks but i think dSuper5 has a pair for me, just waiting to hear. Looking at photos, I don't think these blocks have a shock mount, but do have a bump stop. It appears that 3/4 ton trucks have the lower shock mount welded to the axle housing. It appears the one ton trucks had no rear shocks at all. I am not sure on this but both of my Eaton one ton H072 axles don't have the shock tabs - One is a 65 and the other is a 66...