Build Jacks 40 to fake 45 build

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All welded up.

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Don’t body shops have a tool that can straighten a twisted frame? Just a possible option if it does end up a little off.
Best to create a jig like apparatus to keep things square then tack weld all pieces. For frame section I would put 4 tacks on the C channel then weld top flat section of C then do the bottom of other side then when area is cool to touch weld the bottom of C section of first side welded then do other side top. Checking that it does not lift or drop. A flat bar or square tube tacked to frame will help to be removed later. After it cools then weld the web of the C channel. Grind flush and tack in your fish plates. I would make the fish plates about 12'' long but maybe thats just me.
 
Sheet metal? Wow, you're fancy. The PO who built my half-cab parts truck used plywood. Looks great! : )
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I got tomorrow off work, so it's game on. Getting stuff mocked up to start the rear cab rebuild. WIll measure and square it all up.....then start the fab work. I plan to reuse as much as possible from the donor.
I also have the inspector scheduled for tomorrow. Starting the process for getting a title.

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wish we had all that clean sheetmetal to play with here.
 

Mostly likey a V8. Probably done years before 4 cylinder diesels were popular. Also still had à three or a 40 series 4 speed. Today if I wanted a V8 (which I don't) would be four or five speed with a 60 series top cover.
Thought this one was bad. But nothing like yours.
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I installed a 74-78 in my 68 when I did installed a H42. Had to trim the bad and few other mods but made the four speed a cleaner install.
 
Idk why the material was removed between the 2 holes, but I do understand why the trans shifter hole has been elongated. I did the same thing but i made a plate to cover the elongation. It most likely had a V8.
 
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