Warbirds are their own challenge. Differnet from 3D or whatever, but not exactly easy either. Landing some warbirds is REALLY hard to do smoothly, even for experienced pilots. Landing them in a crosswind can really get your heart pumping. Flying (and espeically landing) with a high wingloading and little margin for error is totally differnet from flying with a super light wingloading and enough power to pull out of anything. (more than once, I've seen experienced acrobatic pilots plant a warbird out of pure pilot error, usually on landing or right after takeoff because they tried to fly it like their sport-acro planes).

Unfortuantly, I haven't flown any warbirds that would go well with that engine, so I don't have a direct recomendation for you. I do see a lot of P-51s in that size flown at my club buy guys with out much more experience than you have. World Models has one that gets good reviews around here.

If you didn't already have the engine, I'd suggest looking at the FW-190 from GiantScalePlanes. With a 1.08 2stroke, it's a really sweet flyer with very few bad habits. Their Corsair is also a nice flyer, though you have to watch the G forces, it's not impossible to fold the wings. (that's actually good advice for any warbird, don't go doing bank-and-yank on them, or full power loops, etc. They usually aren't built for it). I flew a Great Planes Stuka that had a 1.08 in the nose, and it was fun. Had way more power than it knew what to do with (very un-scale), but it was cool.