To the P-38L-10-Lo, I'd add a Hamilton Standard four blade high activity paddle prop with a 13'6" diameter, and I'd release the 64" manifold pressure restriction (odd, the gage in AH II shows 60", it should be 64", the horsepower difference is significant) and allow 74" @ 3200 RPM.
By the way, the P-38L had tail warning radar, which is included in the weight used to model the plane. Why is it not working, since I have to carry the weight, I'd like to have the weight do its job.