Lowell,
I happened to read in a wartime story of a 82nd FG P-38 pilot that they used the warning call "Timber!!" when they spotted enemy planes. This FG operated in N. Africa and Italy.
I don't know however if this warning call was used generally or merely in 82nd FG.
While not answering your question about the specific P-38 you're looking for, why not also contact this FG. They have a good website
www.82ndfightergroup.com that gives you the e-mail addresses.
Regards,
Leendert