Heres the ones i scored off ebay for my 3/4T. You will also need to ream them to fit. I have seen both of these on ebay several times. I just bought mine justvover a year ago. That part number might help you.
Last edited by Barnfind49; Wed Jun 15 2022 12:31 AM.
I'm a machinist and making a king pin one off that was right would be near impossible. They need to be heat treated per GM specs, if you knew what the alloy was. The best and easiest thing is keep digging to find the correct pin.
Custom gunsmiths have been heat treating parts since the days of Brown Bess muzzleloaders in the 18th. Century, or before. Using a Brinell hardness tester is not rocket science, and neither is using a rosebud torch and some Kasenit powder. The only places that might need to be tempered are the ends where the bushings ride, and those don't need to be brittle- - - -just surface hardened. Jerry
"Freedom's just another word for nothing left to lose" Kris Kristofferson
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. Ernest Hemingway
If it is going to be a WORKING truck I'd follow specs but if a cruiser or show piece anything should work. Should be very easy to turn from a piece of 1" bar stock and don't worry about accurate to five places as the BUSHINGS can be honed on a Sunnen to correct clearance. One hour job. My centerless grinder went with the big shop but I still had they would be as accurate as the instrument doing the measuring.
I bought a king pin kit from Chevs of the 40s late last year for my '52 GMC 3/4 ton. Their part number is 601019. The web page did not have dimensions, so I e-mailed asking. The right answer came back, "The 601019 are .920 X 5 1/16 and the bushing is 1.06 OD"
I have a used one time .921" reamer for rent. The guy at the machine shop says it worked great. I haven't done the left side yet, so I'll need it back. Price is $50 (gladly refunded when I get it back) + shipping.
Last edited by Bill Hanlon; Fri Jul 08 2022 06:34 PM.
If you guys are still looking, I ordered a kingpin set off of Rockauto for my 54 3800. It was a few years ago and I was able to get an AC Delco kit, I might have the part number still. They still offer one with a .921 pin that's being sold by Moog.
1954 Chevy 3800 Long Bed: ex-fire truck turned farmer's town run about turned 353T powered retirement project 1953 Chevy 6400: the work truck
Regarding the speedometer gear mentioned by doyle1950, many years ago when I changed the differential gears in my 1958 1/2 ton panel truck (went from 4.11-1 to 3.80-1), I went to a local speedometer shop for help.
They calculated the gearing that I needed vs. what was in the truck from the previous gears (stock) and built me a little adapter that on one side screwed into the side of the transmission and on the other side accepted the speedometer cable.
That little adapter (a tiny gearbox in itself) made the speedometer read correctly. I was a very happy camper!