Designed to use factory fan (small fan recommended). For optimum performance we recommend running with a balanced rotating assembly. You will need to put a few washers between the coil and the engine to center the coil over the magnet.
Set coil gap at least .030"
Timing is set at 32 BTDC
For Predators, Old Style is Model 69730 [R210] tor 69727 that came with Stamped Aluminum Valve Cover.