hi, having the same body mount rust issues with my '91. not a welder either so i'm tackling it in stages. found a good body shop with reasonable prices was the first thing.
then i had them do the ones in the back after i scraped off all the bed liner myself to save some labor time. that was their suggestion... they're real helpful like that ÂÂ

. cost me $250 and they did a real good job. dropped the gas tank to get to all the rust so there won't be issues in the future. undercoated the under body welds and top coated the patches inside.
this weekend i sprayed the rubberized undercoating all inside behind the body panels and then truck bed coated everything else including the back door.
next for the body shop in a few weeks will be the mounts behind the seats and in the front floor. after that will be the rockers and the batttery tray. i'm guessing should be about the same charge for each trip to them. more than worth it to get a good professional job. just my $.02.
