K 20 Body mounts 73-80 Truck

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mummertj

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Mar 3, 2023
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Location
manassas va
First Name
Joseph
Truck Year
1979
Truck Model
k 20
Engine Size
350
Im looking for a set of body mount bushings for a 78 K 20 truck
I need all three sets
I have The PST bushing set but i do not have any of the original hardware ( the insert sleeves ) which PST says are needed
Does anyone have a set or can anyone tell me if the two wheel drive and four-wheel drive are the same
There is a 78 blazer that's local but its 2 WD
 

dsteelejr

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May 25, 2020
Posts
239
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232
Location
Hudson, WY
First Name
David
Truck Year
1973, 1980
Truck Model
Cheyenne super C20 camper special, Sierra K25
Engine Size
350, 454
Never heard of a 2WD Blazer. Sounds kinda suspicious.

Asking out of curiosity, what happened to the ones on the truck? It’s not like people are frequently changing those out.
 

dsteelejr

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Location
Hudson, WY
First Name
David
Truck Year
1973, 1980
Truck Model
Cheyenne super C20 camper special, Sierra K25
Engine Size
350, 454
They were produced until ‘82.
That’s crazy. I’ve only ever heard of their designation as K5, with K = 4WD. Never heard of C5. Must not have been very many of them.
 

Old Guy Bill

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Location
KY
First Name
Bill
Truck Year
1978
Truck Model
K20
Engine Size
400
Mounts are different between C10/20 and K10/20 pickups, Ks are larger.
I’d assume it was the same for the Blazer.
I was looking also, they are on back order most places but did find them at CJ Pony, they have truck parts.
 

nvrenuf

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Mobile, Al.
First Name
John
Truck Year
1991
Truck Model
K5
Engine Size
454
That’s crazy. I’ve only ever heard of their designation as K5, with K = 4WD. Never heard of C5. Must not have been very many of them.

They all carry the “K5” badge / designation until it was dropped completely around 88 or so.
 

mlsceo

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Location
Kingsburg California
First Name
Manuel
Truck Year
1977
Truck Model
c10
Engine Size
350
Try LMC. Update, I checked, looks like they have what you're looking for.
 
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Ricko1966

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Apr 11, 2017
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Location
kansas
First Name
Rick
Truck Year
1975
Truck Model
c20
Engine Size
350
Im looking for a set of body mount bushings for a 78 K 20 truck
I need all three sets
I have The PST bushing set but i do not have any of the original hardware ( the insert sleeves ) which PST says are needed
Does anyone have a set or can anyone tell me if the two wheel drive and four-wheel drive are the same
There is a 78 blazer that's local but its 2 WD
Why can't you just buy some tubing and cut some sleeves.
 
Last edited:

squaredeal91

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Location
Cave junction Oregon
First Name
Greg bush
Truck Year
1991 SB
Truck Model
K30
Engine Size
5.9 Cummins 12 valve
I'm replacing my bushings soon because I recently noticed my bushings are shot/got. Found these but was not sure if this was a good set.
 

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Fat 454

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Location
Australia
First Name
Andy
Truck Year
1973
Truck Model
C20 Suburban
Engine Size
454
go on to the LMC truck site and have a good look at their assembly drawings. You can clearly see the difference between different generations of truck There are at least 3x different set-ups for the Sqbdy blazer generations, mainly due to the flatter frame rail profile on the later trucks to accomodate the "tilt/tumble" rear seat.
They show the different sets for C and K trucks also, as well as single / dual cabs etc. Just check you have the right year and drive train when you search their drawings, and you can see the differences. If you check through the individual part numbers below, you will find there are a lot of parts that are interchangeable also.
I found the best deal was either a full OEM rubber set, or a full urethane set ( but then you have to go back through the OEM set up and pick out the bolts and washers you need that are missing in the urethane aftermarket sets ).
Jury is out on Urethane v. rubber longevity. Urethane will be stiffer, so probably better for panel alignment etc., and should last as non-rotating ( apparently this is not good material for suspension joints - despite all the advertising to say they are ). How long they last will wait to be seen. OEM rubber lasts for at least 30-40 years ( as thats when we start to replace them on old trucks ) but I have had urethane bushed totally crap out after 10 years, so...
 

JBswth

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236
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194
Location
Vallejo, California
First Name
James
Truck Year
1973
Truck Model
C25
Engine Size
292 cubic inches
Never heard of a 2WD Blazer. Sounds kinda suspicious.

Asking out of curiosity, what happened to the ones on the truck? It’s not like people are frequently changing those out.
Yes, there were 2WD Blazers, but they still wore the K5 badges.
 

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