If you torque them to the proper specs you should be golden
The only ones I've seen or heard of loosening up was due to inattention to the tightening specs. or a out of balanced torque converter or motor
My current bracket car with a glide with a 9 inch torque converter that has 3 1/2 inch bolts in it due to the former owner running a blown B1 motor in it, most of the good race Hi Po torque converters for Glide use three 7/16 bolts with lock nuts on the other end, no threads in the converter lugs