Once again thanks for to everyone's input. Going to remove the action from the stock and try to complete the milling w/o removing the barrel.  Agree w/ using a M1903 sight base for the correct "vintage' look.  The barrel currently has a flat that i can use as a baseline for the new one.  i will monitor the milling to ensure I don't take the flat off before the diameter reduction is completed. Once I get the base installed we will take the "Carbine" to the range to work on calibrating the front sight using all the info provided earlier.

For Butlersrangers.  Go Bronco's!  Graduated in '77.  Spent a lot of time at Selfridge AFB (pre and post ANG days) as a dependent in my youth.  First 2 years of High school were at Mt Clemens (Battling Bathers!) then Dad was transferred to Otis AFB on Cape Cod.  My parents moved back to Mason after he retired for the second time. Mom still lives there.

Mark