My new home fabricated ram air

I,m mounting my scoop soon. I,m gonna set it on the car and trace it on the hood. Then I will drill a dozen holes 1/2 inch in from the tracing marks thru the hood. Then i,m gonna realign the scoop inside my tracing and drill up thru the hood thru the holes into the scoop base so all my holes align.Then I will use 5/16 commode closet bolts with the wide flat head down thru the scoop flange and thru the hood. Nut and washers under the hood. I will gaurantee I wont blow it off as fast as I can go.Also thinking about a little dab of fiberglass epoxy resin under the bolt heads so they are fixed to the scoop when it dries.