Hello Stik!
Since I've got an M151A1 in my avatar, I just had to chime in haven't I?
I understand your decision to let the suspension be - since you want it to be a quick build. On the other hand when you look at the Academy model - it's a lot better than the first Tamiya and still it's full of bugs. It was such a big surprise, that Tamiya brought out their new -A1, and it's mostly correct!
Long time ago I wrote up my build of the -A1:
http://vietnam.net.pl/M151moden.htm
I hope this can help you and maybe give you some ideas. There are two things you shoud look out for to make the model more accurate - easy. One thing is the NATO electrical connector under the windshield - do not install it, it's an -A2 feature. Another thing is that V-shaped part under the trailer towing hook - do not install it neither, another -A2 feature. It's for hooking up the trailer's safety chains, on the -A1 the manual had you hook them up to the towing shackles. Now I didn't have the info at the time so those two things are wrong on my model.
Also - the Academy kit instructions got the hood star wrong - it should be pointing forward.
And for those interested - the M151 was the most produced jeep of them all. But you don't get to see a lot of them on the streets - because of that dang rear suspension. It made the M151 dangerous to careless drivers. In tight turns there was a risk of the jeep tipping over, and with no roof to protect the people inside... So when the Army sold those jeeps, they initially sold them cut in two... People started to weld them up.. Army noticed it and changed the procedure to removing all the major parts and riding the body over with a tracked vehicle - not a nice thing to do, eh?
One more thing - to see that Air Force FAC jeep, google for MRC-108 communications set.
Stik - good luck with your build and have a nice day
Paweł