Okay, so I just finished getting the frame 100% mechanically ready for the body, even started it up after a total rebuild. Now I'm poking around under the body and find the rocker channels are rusted out. Holes the size of baseballs around #2, and #3 body mount holes. Interested in hearing from anyone having same experience what the best way to repair is? I have located channel sleeves, front insert, and rear insert, but not sure what is required to replace these parts? Don't know if I can take too many more surprises with this project! Help please?