Ah, an Allison Mustang, great choice!

Yeah, it got warm hereabouts, and I haven't been able to get into the attic. Keep your fingers crossed. It's getting cool next week.

Tom, the Medallion thing I am shooting your way also has a prop with it...FYI

Jeff, both are sorta available, on the second hand market, at this point. Accurate Miniatures had the Allison engined Mustang as a series, A-36 dive bomber, and cannon and machine gun armed versions. They are out of business, and I don't know who has the molds currently.
Classic Airframes had the P-51H, and they, too are out of business. E-bay or someone on this site might be able to help. Good luck!

Got a little modeling time in this weekend. Set the Spit aside for painting and began some work on the Allison Mustang. Attached the nose section contrary to when the instructions stated when you should do it. Wanted to make sure they aligned well. Went with the decal behind the clear instrument panel. Placed some drops of liquid mask over the dials, then painted the panel and removed the masks. Did some dry brushing on the dial faces as well. I added an Ultracast seat to the cockpit and with all the parts painted did a wash using Future, water and brown acrylic paint. Should be able to attach all the parts soon and then both will go to the paint booth. I also was able to cut the canopy as to display her with an open canopy.

4 attached images. Click to enlarge.

Looking good!

Time to close this puppy up and get her ready for some paint. Had to use a small amount of putty on the spine and along the left wing root. Nothing serious, parts fit quite well, most likely operator head space was the cause.Took some time to ensure the cockpit was level and aligned with the left side. Attached the bottom wing per instructions then glued the wing tops on. Good practice for the Tuskegee P-51C I want to do in the near future. Anyway she's starting to look like a P-51.

7 attached images. Click to enlarge.