Mike, only if somebody threaded it after it was manufactured (which happened sometimes but not as often as you would hope). Generally speaking if this had been done, the bolt would have still been there...but you never know. If you bend a paper clip in a 90 degree angle with about 1/4" on the short leg and drag it from inside out you will feel threads if any are there. As for diameter and pitch...that depends entirely on whoever threaded it. Good luck!

~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end