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Bob, this was a "challenge truck". First the original rails were cut very short. The rearmost vertical weld of the "Z" is, is where the rails ended. If we had more rails to work with we would probably opted for a long angled weld and do some fish-plating. We V-groved the joints on both sides and...

Here's another way to weld on rail extensions, a Z weld, which spreads the load nicely in the new structure (and the weld). . This extension required some serious strength since owner was planning to pull everything imaginable. hjs

Cheapest way to purchase frame extensions is to go to a truck junkyard and get a piece from a salvaged truck frame. Truck frames are remarkably universal, the steel is 1/4 inch thick 12 inches high and the the flanges are 3 inch wide. You shouldn't drill the flanges and you shouldn't heat or...

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