Love the P-40, was always one of my favorites as well.
thanks for all the replies.
As of right now... I'm thinking 4 power-25's with ESC's, a battery for the radio and I'd like to try to one run battery for the 4 engines... though it may be easier to run 1 battery per wing, so 1 battery for 2 engines. I'd probably use LiFe batteries so that I could have some safety with charging them in the plane... I don't think I'd want to remove 4 batteries after every flight, or even 2.
I have to get this on the workbench and get it finished before any of that can even happen though! I think this plane will be a lot of fun once done...