i was wondering if chevy had a problem with week frames on the the early blazer. i have 69 and my froward rear spring shackle RHS pulled the rivets out of the frame. there were several cracks surrounding each hole. i managed to fix the problem and use bolts instead of rivets. has any one else experienced problems like this. oh and upon further inspection of the truck i found that the forward front shackle LHS was cracked at the rivets where the body mounts to the upper portion. the blazer has 4 inch superlift springs and 2 in body lift. i am running 37in tires.