2wd to 4wd conversion

[PrairieDrifter]

I don't think that's a valid reason for not recommending it. The 2wd crossmembers hang sooo far down compared to 4wd. Why couldn't you use the factory style 4wd crossmember? Or aftermarket?

This is a great thread by the way. The only question I have is measurements on the front rear spring hanger. It seems as just eyeballing will be fine for mounting location as long as both hangers are perfectly aligned with each other? As well as low enough to clear the spring eye on the frame.

 

[Raybob9289]

Started frame swap Saturday

 

[Raybob9289]

Took all day. It's a ton of work. BTW the K30 SRW rear spring brackets are different.
I think they are the same as a K20??

 

[PrairieDrifter]

Took all day. It's a ton of work. BTW the K30 SRW rear spring brackets are different.
I think they are the same as a K20??

I believe that's correct, then to go even further the cab and chassis trucks have narrower axles and both rear spring hangers are different. Tucked up closer to the frame.

 

[Raybob9289]

I believe that's correct, then to go even further the cab and chassis trucks have narrower axles and both rear spring hangers are different. Tucked up closer to the frame.

And the Dually spring perch brackets are like a factory lift.

 

[Raybob9289]

Started Raining on me the next day. But I moved the cab back to start exchanging parts from 1 frame to the other. It should be way easier to swap the engine trans & T-case without a cab in the way.

 

[Craig 85]

Took all day. It's a ton of work. BTW the K30 SRW rear spring brackets are different.
I think they are the same as a K20??

K30 and K20 spring hanger are totally different. K30 are almost vertical. The K30 is mine. The shocks mount inside the frame due to the location of the spring. Shocks are also reversed from a K10/20.

Second group of pictures is a C20, but the same idea as a K20. K20 is 2" longer and has the spring eye bolt below the frame rail. Shocks sit between the frame and spring, forcing the hangers to sit farther away from the frame.

K30

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C20

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[Raybob9289]

K30 and K20 spring hanger are totally different. K30 are almost vertical. The K30 is mine. The shocks mount inside the frame due to the location of the spring. Shocks are also reversed from a K10/20.

Second group of pictures is a C20, but the same idea as a K20. K20 is 2" longer and has the spring eye bolt below the frame rail. Shocks sit between the frame and spring, forcing the hangers to sit farther away from the frame.

K30

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C20

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Your K30 has the same rear spring hangars. Thanks for the pics

 

[bucket]

Yeah, K30 speing hangers are the same, regardless of dual or single. The C30 hangers are shorter. "However", the early K30's ('77-sometime in '78) used C30 hangers and lift blocks to make up the difference.

 

[Raybob9289]

These are definitely different

 

[Raybob9289]

And fronts

 

[Raybob9289]

Weekend Progress

 

[bucket]

These are definitely different

And fronts

So those are '77-'78?

My '79 K30 dually most definitely has the same hangers as the two sets I have from M1008 srw trucks.

 

[Craig 85]

And fronts

The 2WD also does not have the extra bracing below the frame for the brackets like the 4WD does.

 

[Raybob9289]

So those are '77-'78?

My '79 K30 dually most definitely has the same hangers as the two sets I have from M1008 srw trucks.

The ones I'm holding up in the pics are off the 78 K30 frame. The spring perches I put on I got off a early 80's K30 cab & chassis in a junkyard.