I had to drill some holes in my truck for the roll pan - and will have to again for the nitrous line - whats a good way to keep everything free of rust? just a spray of some rustoleum to the underside of the hole? or .......

 

probbable. or spray paint and clear coat.

 

maybe if I just use some locktite or thread sealant on the screws?

 

jsut get a can of spray paint. Get a scuff pad, prep the surface and paint it. you shouldnt have any problems.