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Old 10-23-2012, 10:12 PM   #18
Mustard72
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Join Date: Jul 2012
Location: Ladysmith, WI
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Re: 72 C20 "Old Mustard"

Once I had the cab on it's back, I ground off the welds connecting the "floor" to the back of the cab, then proceeded to find all of the spot welds in the floor/firewall joint. I think there's just shy of a bazillion of the dang things. I'm also thinking that the spot weld guy back in '72 didn't have any sort of jig to use to place the things, as they were sort of all over the place on the flange. Many of them were right close to the bottom (or top, depending on which way the cab is sitting, I guess) of the flange. I ended up being too cheap to spend the $5 for a spot weld cutter from Harbor Freight (would have cost more to ship it here than the cost of the cutter itself), so I just drilled out the spot welds using two smaller diameter bits and then the 3/8 bit. With some of the spot welds that were close to the cab floor, I ended up removing some floor material, too, but it seemed to be almost unavoidable, and not that big of a concern at this point anyway. I didn't get the floor all the way out, however, before I ran out of time for the day, so that'll have to wait. Even with the spot welds theoretically drilled out, there is still some areas welded together which will obviously take some more work. I used a cutoff wheel and made a cut a few inches down (or back if it were sitting normally) from the flange all the way across, but I haven't gone through the two major front to back ribs (can't remember exactly what they're called), and I didn't get all the way through one of the sheets scabbed in under the drivers side footwell. That, too, will wait for another day.
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Nick

Old Mustard, 1972 Chevy C20, 350, TH350, 4.10 Dana 60 rear, owned since I was 16 in 1986
http://67-72chevytrucks.com/vboard/s...d.php?t=545356

Blue Bell, 1987 K20, 6.2L Diesel, TH400/NP208, 4.10 gears

Ustahav 1976 K10, 350/350/203, Gov Loc, Yooper beater trail truck.
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