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Old 04-19-2015, 11:19 PM   #37
Vintage Windmills
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Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
Re: A different approach to a LWB to SWB conversion

Quote:
Originally Posted by imjeff View Post
The steel in a weld is stronger than the base material, but the adjacent steel undergoes changes that induce internal stress in the steel and it becomes the failure point. Once again, this isn't a welder ability issue, this is metallurgy.
True statement.

Maybe since its a thicker frame than any Swb that ever left the factory with, it will have stresses low enough to not be an issue, but so much of it depends on usage (loads and miles driven). A fishplate or formed channel insert just seems like cheap insurance.

I like what he is doing here otherwise, this seems like a well thought out way to shorten the bed and Im on my toes to see how he does the back part of the bed.
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67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades)
67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore )
86 CHV K30 502 th400, apple red NEW
71 CHV K20 350 SM465, ochre (saved work truck)
71 CHV K20 292 SM465, white, tach, PTO, (future project)
72 CHV K20 350 350th, medium blue (project stocker)
01 CHV K2500hd crew, indigo blue

^3 dont run and the others don't see winter either
'86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649
'71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642
'72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6
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