1964 galaxy XL convertable

I have a 64 xl conv.,with a 427 eng, auto trans,1- 4 barrel carb.shifter on the floor.No power steering,or brakes.I am the 2nd owner of this car,1st owner has died.It has a (R)in the serial #.I drove this car for 15 years, but now in bad shape,rust wise.Some say that Ford only made 4or5 of them for NASCAR.Does any one know about it. I will sell to highest price. Thank you .J.J 608-753-2411

I'm no expert on codes or how many were made, but a auto convertable doesn't sound like a NASCAR to me. They were usually 4speed fastbacks.