I agree with Roger. My son Doran and I recently installed carpet from Clark's in his 65 coupe. Generally an easy job as long as you take it slow. (We did mess up slightly and cut the slit for the gas pedal a bit off, but we patched that with scraps that we cut off, and no one but us will know.)
Travis Payne 65 Monza coupe
Raleigh, NC