Nice lookin' jeep so far!
A couple of things to look out for:
First, I'm not sure what your kit instructions say, but my 1/24 scale kit instructions say to paint the engine and transmission grey. If you plan to show the engine, paint it Olive Drab unless you're going for a "This jeep haas been rebuilt at least once using whatever jeep parts we could find" look. Ford made jeeps as well, and they painted their engines grey. Willys painted theirs O.D.
Second, the machinegun mount should have a couple of T-stock supports bolted ot the floor about midway between the footrests and the rear seat supports. This is how it should look:
Hope this helps; sweet jeep!