If you don't already have the tools to cut the 13/16" hole, I highly recommend Blair hole cutters. I got a very precise hole with no "walking" on my finished paint when I installed an antenna. I've loaned them to other Bolters who have also experienced good results.

Here's a link to the company, but you can buy them through Amazon or several of the "usual" vendors. http://shop.blairequipment.com/SearchResults.asp?Cat=4&gclid=CMS2pqPF0MkCFYVbfgodVDALnw

Bob


1959 Chevy Apache Short Bed Step Side
1967 Cadillac DeVille Convertible
1967 Pontiac Firebird Convertible