Here we go... 1969/70 Chevy C10/K20 projects

James K

NO, I'm always like this
Location
Taylorsville, Ut
Been working on the swap to air bags, there's a lot going on and it's taking time to make progress.... upgrading to disc brakes, replacing all the ball joints, painting control arms, adding 2.5" drop spindles, notching the rear frame, adding the rear track bar, etc.

I picked up a cheap set of used, chrome 20" wheels and set of new, cheap 245/40/20 tires to test fit size, backspacing, etc at full drop.

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I got the front bags, drop spindles and new parts on and had to set it on the ground. The rear isn't notched yet, so the frame is sitting on the axle housing. It'll drop another 2.5 to 2.75" once it's notched. I can't believe how AMAZING it looks at this point.... it looked OK before on huge 22's with the 3" & 4" drop, but this is a totally different level! It's going to be so fun to drive!

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that is better
 

Dquarve

New Member
Just a spent the last hour and a half reading through this thread. Very well put together, but now I’m going to be tired at PT in the morning ha. Do you have plans for the k20 anytime soon?
 

Greg

I run a tight ship... wreck
Admin
Just a spent the last hour and a half reading through this thread. Very well put together, but now I’m going to be tired at PT in the morning ha. Do you have plans for the k20 anytime soon?

I appreciate that! Unfortunately I sold the K20 recently, I loved the truck but was feeling pretty spread thin and had to free myself up.
 

Dquarve

New Member
Aw man too bad, I was excited to see that. Either way, I’ll return to your OBS thread and gather more inspiration for mine there. I’m sitting in a blue Interior just like yours as we speak haha.
 

Greg

I run a tight ship... wreck
Admin
I haven't really had any time to touch the C10 until recently.

Out back, the rear axle was limited in up-travel by the frame. I bought a notch kit from Speedway Motors and went about hacking away... the biggest PITA was knocking out the rivets. I made some cuts, then went about bolting up the beefy notch plate.


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The uptravel was still limited with the bags bottoming out, I realized I needed to lower the control arms and once again made an order from Speedway Motors with this handy drop block and new u-bolts. Install wasn't too bad.

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It was time to setup the air compressor, tank and then wire and plumb the system. I decided to set the compressor and tank on the passenger side, under the bed at the front. I upgraded from the dinky single cyl Viair compressor to the NAPA Dual Air Compressor, with some upgrades to make it last. The compressor upgrades include; 4 gauge jumper power wires, a 100 Amp Bussman circuit breaker, Ford style relay switch and a copper hard tube to the air tank. The copper will dissipate heat and won't burst like the cheap rubber hose the compressor came with.

I also upgraded to Moroso battery terminals, so I had several options to tie power and ground for the compressor to the battery.

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The air bag kit came with a 2.3 gallon air tank, I have a drain valve, pressure switch, air supply fitting and a temp pressure gauge. I'll eventually add a air chuck, so I can air up tires too. I added a mount for the air tank, sitting upside down. I used a super handy Nutsert install tool from HF and it really made this a simple job. I need to add a switch for the compressor on the dash, at the moment it's wired direct and the compressor runs once you turn the key on.... and that's a hefty load for a truck that isn't running.

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I mounted the gauges and switches on the dash, not the most convenient location but its what I had to work with. Then, I started running air lines, the supply from the compressor and then lines to the individual bags. I want to put the gauges in the dash and put the air bag switches where the gauges are eventually.

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Once it was wired, I tested the wiring and it worked!! The compressor was cranking out tons of volume and pressure, but the compressor didn't want to push more than 130-135 PSI and my pressure switch is set to kill the power at 150 PSI (on at 120, off at 150). That's way more air pressure than I need, so I'll swap it it to a 90 to 120 pressure switch. The truck should only need 35-40 PSI out back and 50 PSI up front. I ran out of 1/4" air line to finish the front, I'll pick up more tomorrow.

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Here's the result though, this was so exciting to see!!

 

Greg

I run a tight ship... wreck
Admin
Spent more time on the C10 today, ran air lines to the front bags, zip-tied air lines and added abrasion protection in places, then worked on getting calipers, new brake lines & shocks back on. I put it on the ground and aired it out, LOVE how low it sits! You actually have to drop down to get into it. 😍


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I crawled around checking out clearances, seeing what'll hit the ground. The exhaust is damn near on the ground! The collectors on the headers set the exhaust pretty low, I can probably tweak the rest and get it a little higher. I don't plan to drive it aired out, but about 2" up... I'll have to be careful around speed bumps!

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I noticed the axle wasn't sitting on the bumps and figured I'd crawl around and find the issue when it was back on jack stands. The top of the diff is actually hitting the bed!! I'll need to lower the bump stops so they hit before the axle & bed. The Farmer-fixed track bar hits a crossmember too, I have a new one though.

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