I'm not 100% sure, but the gears are almost certainly the same in AH as they were during World War II.
If what you suggest was put into practice in real life, then there's a chance it will come into AH, but if what you're suggesting never happened, then there's next to no chance of ever seeing it in AH.
Also, I don't know whether they ever did use Jeeps without the .50 gun, but even if it were used this way (I suspect it was) what use could we possibly have for it in Aces High? The .50 is the only active defence our Jeep has, and it's not much of one, to say the least. In game, the Jeep's best bet is to try and outrun its enemy.
(However, it would be nice to have a Jeep with a recoilless rifle, if these were used in WWII.)
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Yossarian