I used a 91 S10 frame and was pleasantly surprised to find that 5 inch heavy C-Channel fits tight inside the rails for the purpose of extending the frame if needed. The frame could easily be adjusted for length before final welding. I was alone, working in my driveway, and could easily extend or retract it to make length adjustments when rough fitting my long WB 46 Panel body. After seeing the S10 with her body off, I'm watching for other possible bodies to put over an S10 frame. This could get out of hand. 8-)
MV


46 Chev One Ton Panel - S10 Frame Project

"What if the Hokey-Pokey is REALLY what it's all about?" - J. Buffet