C20 to c10

[letgomyleghoe]

Hey,
I recently bought a 1984 c20 off a friend to replace my rusted out 1974 c10, I would like to keep the wheels I have off the c10 and the 12 bolt posi. As far as I’ve read I should be able to get a conversion U-joint for the rear axle and it should all bolt back in. The front suspension is what’s been confusing me, I’ve read to swap the tie rods, lower control arm, and put c10 ball joints on the upper control arm, then a c10 spindle should work. Has anyone done this swap that can chime in?

 

[ali_c20]

You could swap all suspension, steering and brake components from your C10 to the C20 as the engine crossmembers and mounting points are the same. You could even swap the whole crossmember.

 

[letgomyleghoe]

You could swap all suspension and steering components from your C10 to the C20 as the engine crossmembers and mounting points are the same.

I’m trying to do this with as little work as possible, the c20 suspension is also in much better condition, I don’t see a reason to swap in the c10 suspension. I saw CPP makes some “modular spindles” so I may just end up using those.

 

[ali_c20]

I’m trying to do this with as little work as possible, the c20 suspension is also in much better condition, I don’t see a reason to swap in the c10 suspension. I saw CPP makes some “modular spindles” so I may just end up using those.

The modular C20 spindles can be used with 5 lug rotors?

 

[idrivea2002golf]

You could swap all suspension, steering and brake components from your C10 to the C20 as the engine crossmembers and mounting points are the same. You could even swap the whole crossmember.

The ENTIRE C20 cross member is about 12 bolts and it drops right out as an assembly.

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[Tonimus]

We converted a '72 C20 to modern 6 lug stuff. What we ended up doing for the front was we got a ball joint reamer and reamed the 1/2 ton lowering spindles to fit the 3/4 ton suspension. Worked fantastic.

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[letgomyleghoe]

We converted a '72 C20 to modern 6 lug stuff. What we ended up doing for the front was we got a ball joint reamer and reamed the 1/2 ton lowering spindles to fit the 3/4 ton suspension. Worked fantastic.

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I think this is the route I’m going to end up taking. As far as I can tell everything should bolt up except for brake lines, and I won’t have to **** around swapping control arms. Thanks for the input.

 

[GreenC20]

We converted a '72 C20 to modern 6 lug stuff. What we ended up doing for the front was we got a ball joint reamer and reamed the 1/2 ton lowering spindles to fit the 3/4 ton suspension. Worked fantastic.

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I'm in the process of trying to do the same thing, this might be a long shot cause this post was a year ago but what exactly did you have to ream out? And did you have to use a different caliper for the new 6 lug rotor?

 

[jcperformance]

Hey,
I recently bought a 1984 c20 off a friend to replace my rusted out 1974 c10, I would like to keep the wheels I have off the c10 and the 12 bolt posi. As far as I’ve read I should be able to get a conversion U-joint for the rear axle and it should all bolt back in. The front suspension is what’s been confusing me, I’ve read to swap the tie rods, lower control arm, and put c10 ball joints on the upper control arm, then a c10 spindle should work. Has anyone done this swap that can chime in?

Swapping parts from a half-ton C10 to a three-quarter-ton C20 is definitely doable, but it’s a bit of a project since you're essentially downgrading the load capacity. For the rear, you're on the right track with the conversion U-joint; you'll just need to make sure the spring perch widths match up, as some C20s have narrower frame rails depending on the original bed configuration.