Car Antennae Work

Does anyone know of work that could be done on a Mustang to convert the antennae from outside to an inside car antennae?

I've heard of people moving them inside. One guy I talked to mounted his on the dash side of the firewall and drilled a small hole in the dash pad for the antenna to go threw. You really couldn't even tell it was there, especially since it was in the corner. I Considered doing this to my old mustang. I was going to bring the top of the antenna up threw the defrost vent, but I didn't have a heater or anything in the car.

What kind of Mustang do you own? You done anything else with the car?

That was with my 1987 mustang coupe. It was an ex 4cyl car, but I swapped a 351w in it. When all was said and done I had a 700hp mustang. It got to where it was just no fun to drive. So I sold it and put together my current hotrod. The 1969 Cougar with 475hp & a 5spd.