DragStuff

I believe my Blaster 3 coil has gone bad. at the strip, all new motor, car ran very smooth at 3/4 throttle. under full load, it just labored. actually ran slower. MSD said the AL 7 was OK. I have a Ford E-coil. but no mounting bracket. square stacked metal, with holes in each corner. can I use std metal machine screws, thru those holes? or do I need aluminuuuun or plastic?
thanks Rod in AZ