i have a 1999 gmc sierra reg cab short bed. i have a 1999 6.0 for it. and now im trying to put it in and bolt it to the tranny i have until i build a 4l80e for it. i have the 4l60e now. the flex plates look a little different. and if i use the 5.3 stuff on the 6.0 the starter wont hit the flexplate it i dont think. HELP!! haha just wondering if im missing something or if i need some type of conversion kit. THANKS GUYS!!!!