Author Topic: 66 Chevy K20  (Read 597 times)

87Warrior

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66 Chevy K20
« on: June 11, 2018, 05:48:57 PM »
It's big.

It's Orange.
and
It starts to wander at 45mph.

1966 K20. 57k miles. 292 with 4speed.

I have a lot of history with this truck. My old man bought it in 86. It was a rusty work truck we used to go firewood cutting. Sometime in the late 90's he brought the truck into the garage to restore. New rust free cab, NOS fenders, a couple of good doors were found to be used. This truck was intended to be my first car in High School. Time slipped away and he sold the collection of parts to family friends who put the truck together, painted it and put the flatbed on around 07. I ended up bringing it home the other day and got to drive it for the first time.

I don't have any plans for the truck other than fixing a few issues and keeping up with maintenance. It won't be a wheeling truck or anything like that. Just a driver and hardware store truck.
« Last Edit: June 11, 2018, 05:49:57 PM by 87Warrior »

Onyx Dragon

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Re: 66 Chevy K20
« Reply #1 on: June 11, 2018, 07:40:26 PM »
That is a nice truck!

Kalgorn

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Re: 66 Chevy K20
« Reply #2 on: June 11, 2018, 10:52:34 PM »
I love it!

2002 Silverado | 1995 Talon TSi AWD | 1989 Prelude Si 4WS

speedy_2

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Re: 66 Chevy K20
« Reply #3 on: June 12, 2018, 07:53:11 PM »
It's perfect just the way it is.  Very cool! 

87Warrior

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Re: 66 Chevy K20
« Reply #4 on: June 13, 2018, 04:23:38 PM »
Thanks guys!

Last night my wife and I took the truck for a spin. Man is it a beast to drive. She was shocked at how noisy the cab was since it was her first time in the truck.

I planned on driving it to work today, a break from 100 degree temps with a high in the mid 80's... Damn thing wouldn't start this morning. I may have flooded it out with the manual choke. The carb has never been apart (at least in the past 32 years) so I am going to get a carb rebuild kit since the little single barrel Rochester is weeping fuel from a gasket.

Onyx Dragon

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Re: 66 Chevy K20
« Reply #5 on: June 13, 2018, 05:42:00 PM »
I love that color...though I may be biased haha

87Warrior

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Re: 66 Chevy K20
« Reply #6 on: June 17, 2018, 06:03:38 PM »
Apparently it doesn't run cool enough to drive around when the temperature is at the century mark. Made it into town and the dang thing overheated. Had to ride the strap home.

Kalgorn

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Re: 66 Chevy K20
« Reply #7 on: June 17, 2018, 08:46:14 PM »
I wonder about the condition of the radiator. Might be pretty plugged up from the many years.

2002 Silverado | 1995 Talon TSi AWD | 1989 Prelude Si 4WS

87Warrior

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Re: 66 Chevy K20
« Reply #8 on: June 18, 2018, 11:01:10 AM »
I wonder about the condition of the radiator. Might be pretty plugged up from the many years.
It still has the original Harrison radiator, so there is a good chance of build up. Upon closer inspection, I noticed 3 rows of the core have been cut and sealed, presumably due to leaks. I'll probably try to find a reputable radiator shop (do those still exist???) and have it re-cored.

In the meantime, I want to find a cheap, suitable, radiator so I can keep working through the truck. Looking at a Champion aluminum unit right now.

speedy_2

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Re: 66 Chevy K20
« Reply #9 on: June 18, 2018, 12:41:10 PM »
Wow, in your temps I'd probably install something that is overkill! 

angry hampster

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Re: 66 Chevy K20
« Reply #10 on: June 20, 2018, 08:51:56 PM »
That thing is rad as hell

87Warrior

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Re: 66 Chevy K20
« Reply #11 on: June 27, 2018, 11:51:17 AM »
I installed a new Champion aluminum radiator found on eBay. I painted the tanks black since there is nothing shiny under the hood. The new radiator is 1" taller than the original. Since I don't want to modify the original radiator support I cut a spacer from scrap. It still needs finish work, but holds the radiator solid. Thankfully the abnormally tall hood on these truck provides a lot of clearance.

It didn't get hot on my test drive at 90! The real test will be tomorrow when the forecasted high is 108.

87Warrior

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Re: 66 Chevy K20
« Reply #12 on: August 03, 2018, 03:18:28 PM »
Installed a 1976 Medallion AM/FM/CB radio with two 4" speakers in the factory dash location. I really wanted to install a factory AM radio, but when I removed the plate over the radio hole I noticed the dash was cut for a 70's era radio. It doesn't sound great, but it is audible over the trucks gear whine at 55mph.

87Warrior

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Re: 66 Chevy K20
« Reply #13 on: October 25, 2018, 10:52:43 AM »
When a $15 part makes you rebuild the carburetor, change the spark plugs, replace the fuel filter, pull the valve cover to check for a sticking valve and generally question your sanity.

Well played points....well played.

A month ago I was driving the truck and it started running bad. It lost power, started surging and backfiring through the exhaust and carb and wouldn't idle. I was able to drive it home. I assumed something was amiss in the carb since the truck sat for several years before I got ahold of it.

I picked up a carb kit and accelerator pump assembly from Mike's Carburetor Parts for the Rochester B. The rebuild went well and the only issue I saw, outside of carbon build up, was a cracked leather plunger on the original accelerator pump. I immediately took the truck for a drive and was shocked at how well it started  and drove down the road, but once warmed up it was doing the same poor running crap I thought a carb rebuild would fix. Still thinking fuel, I replaced the fuel filter and that didn't fix it. Picked up new AC Delco plugs and condenser and cleaned the points. There was still no change in the way the truck ran once warm. One evening I noticed the exhaust manifold was glowing red at cylinder 3 and 4 so I inspected the valvetrain and found nothing out of the ordinary. WTF!?!? I then checked for intake gasket leaks, manifold cracks, something...and found nothing. I hooked up a timing light and noticed it was reading waaaaay retarded. The 292 isn't known to jump time as it is gear driven and I hadn't touched the dizzy hold down. I checked the points gap and it was at about 0.003" with no more adjustment. Picked up new points and condenser at Napa, gapped to 0.019" and checked the timing...9 at 1000 rpm with the advance hooked up. Dwell is a big long at 40 but close to the recommended 34.

Damn truck runs great. Now I'll fine tune the timing and carb with a vacuum guage and dwell meter.
« Last Edit: October 26, 2018, 12:01:34 AM by 87Warrior »

Kalgorn

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Re: 66 Chevy K20
« Reply #14 on: October 25, 2018, 05:18:23 PM »
I understood some of those words. I don't have any experience with distributors or carbs (automotive). :lol:

And on the positive side, you've got a rebuilt carb, new plugs, and a new fuel filter. :)

2002 Silverado | 1995 Talon TSi AWD | 1989 Prelude Si 4WS

87Warrior

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Re: 66 Chevy K20
« Reply #15 on: October 26, 2018, 12:14:31 AM »
It has been fun to learn some of the old school tuning tricks and techniques. Luckily I had a tach/dwell meter and timing light in the shop to get going and a generic antique car tuning book.