How would you tack a bolt head in place to an aluminum seat rail?

[Cobra4B]

Installing the ultrasheld in the panoz using the Hardbar seat mounts I had for the corvette. Had to drill new holes to meet up w/ the panoz chassis and the rear bolt heads are not accessible with the seat in. The bolts go down through the frame and use a lock nut under the car.

So.... I need to bolt heads tacked in place so I can tighten the nut on them. The seat rails are aluminum. A local body shop near me didn't have the rigth welding rod and the weld he tried popped right off.

I need this back bolt to be locked in place before I put the seat in:


I got some of this Permatex metal epoxy:


Would it work? Or shold I take it all to a shop and have them weld 2 strips of aluminum plate to either side of the hole so when the bolt head is in place it cannot turn?

Thoughts? I figure if a Lotus Elise's chassis is all bonded/glued together that the right stuff shold do the trick, no?

[Cobra4B]

Epoxy worked like a charm.