Yes, the truck was a F-250, I call it a 350 now. I did put a Dana 60 under the front end and reinforced the chassis. The orginal framerails were made from a 5 to 6 inch channel. I put 2 x 4 x 0. 25 tubing in the channel. I bolted the tube to the channel excessivly and welded the tube ends together. I made several cross-members between the new frame rails. The beauty of this was the engine mounts were welded to the tubing along with the front spring mounts. It is much easier to weld to the hot rolled steel tubing than the original chassis. All the engine/transmission weight is on a "craddle" directly connected to the suspension, it does not add significant additonal stress to the orginal chassis. It added around 250 lbs to the overall weight, but I wanted to be darn sure it was going to hold up.
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95 Ford F-350 4x4 Ext Cab, Cummins 6CTAA 8. 3, Fuller 9 Speed, Big Rig Heart in a Pick-up Truck