Hey, I am not from Billings, but I am in Bozeman, not too far away. I have a 73 F-250 2 wheel drive with a 390 that I am rebuilding as we speak. I have replaced everything major except the trannie and the body (don't have enough money for the paint job yet) Manual transmission and 3.30 gears in the rear end. Good luck with the project!

Rachel