I'm getting ready to install my engine and trans into my car. I'm using a Circle D converter and sfi approved TCI flexplate. The bolts that came with the converter are 10.9 grade but are too short (made for a stock style flexplate). The TCI flexplate came with the correct length bolts but they are 8.8 grade. I'm assuming its ok to use the 8.8 grade bolts since they came with the sfi approved flexplate but it concerns me that they aren't 10.9.
Any opinions on this? I want to be sure they don't break, this will be going in a low 10 sec car with a trans brake.
Or does anyone know the ARP part # for the 20mm long torque converter bolts if I decide to replace them?