Personally I would go with the orange engine who cares about typical for the model and make, thing is that its never gonna be a restored unit so the nice thing is all the rules go out the window and you can just do what you want.
Should be an interesting build though, typically when people try to build jeeps at least in my experiences they always tend to go with a Chev 350 since they are a dime a dozen. To me the choice of an actual AMC 360 is intriguing. When you first said 360 I was assuming you had changed you mind and went with a Chrysler mill.
"If you get hit and it hurts hit him back you not knocked out yet."-Joe Doerksen
The Toxic Terrors (FFL)
Demetrious Johnson*Eduardo Dantas*Emanuel Newton*Will Brooks*Michael Page