<strong>Frame & Suspension</strong><br> A stock factory M-38 frame is the strongest factory flattie frame, so I found a good used one for the build. I converted it to YJ Wrangler leaf springs for their great flexibility. I used rear hardtop-spec springs all around for the added weight carrying ability, and then added a stock main leaf to each pack. A shackle reversal in the front was for the combined strength of an integral winch mount—a nice solid front with no moving parts to break. Adjustable Rancho 9012 shocks with 14 inches of travel on extended shock towers were the best tech available before the turn of the century, and they still work great. The frame as shown has been field fixed more than once.