How much torque should be applied to the flex plate bolts on a 1988 Nissan Sentra?

My 1988 Nissan Sentra keeps breaking flex plates. What could be causing this? I have a new flex plate, torque converter and transmission I am installing in the car in the hopes that this will resolve the issue. But I need to know how much torque i should use installing the flex plate%26gt;|||Buy a manual or ask a garage that has a manual for the torque specs. If it keeps breaking the flex plate my best guess is you are missing a dowel pin that locates the engine/trans assembly at true center. You may have one pin missing, or both. Without one or both pins the crankshaft and torque converter are not in perfect alignment causing the plate to fail. Did the old converter have a trashed bushing in the hub? If the bushing was severely worn, or the stator on the trans shows significant wear you are probably missing a dowel pin. If the engine was changed make sure there is no pilot bearing/bushing from a standard trans in the back of the crankshaft.