installing CB + antenna and gun rack in a 67 K20?

[psychobilly451]

I plan on installing all these things and dont want to destroy my truck.

I figure I might be able to use some sort of clamps to mount the cb under dash?

I dont want to put any holes in the cab for the antenna. can I mount it on the bed and still get good reception?

does anyone know of a gun rack that wont require me to drill into my cab to mount it?

I guess these aren't necessarily chevy specific but i know you guys care about these trucks like I do.