Hay Rossco;

It's a great flying P-51, maybe one of the better ones out there. It's a stand off scale, and for a fighter, a real floater on landing. I've seen everything from .36 to .68's in the front end with a good .46 your best bet. I would beef up the landing gear area with a good coat of thin epoxy...same with the fuel tank area. I would also suggest you but a good Du-Bro fuel tank in the model, and junk the one in the kit. As to moving the tail wheel forward to the scale area, I would suggest you fly it first, for this is going to be a little work for you. It is a very good flying model. I had a Fox .50 in mine...and I had mine for over a year with many, many flinghts on the airframe. Your going to have ball with the model.

Soft landings always,
Bobby of Maui