I hate to ask simple questions on here but I have been searching for hours and have found nothing. I need to know what size and grade bolts are used to attach the flexplate to the crank and the torque converter to the flex plate. The application is a 350 Chevy motor and a TH350 Chevy trans. The motor has a one piece rear main seal. The crank looks to be a 3" bolt circle for the flex plate. It is an externally balanced flex plate, 168 tooph. I have not dealt with this type of set up for many years and have lost all knowledge. I understand that the flexplate bolts to the crank and the torque converter bolts to the flexplate. Well at least I think I understand that...it makes "sense" to me but I have been known to be a real dumb ass on occasion. I believe that there needs to be 1/16" to 1/8" clearance between the torque converter and the flexplate once the trans is bolted to the motor, after which the converter is slid forward to engage the flexplate. True? I really, really, really need to get this done this weekend but I have no clue what size, grade, strength (stremph?) bolts/nuts/lockwashers/flat washers to use for this. Call me a dumb ass (you're a dumb ass) but I can't find anything or remember what the hell to do. Ladies and Gentlemen I am in a state of shock...so THANKS in advance.