No, the A3 variant uses the same CAT motor as current the generation FMTV(family of medium tactical vehicles) 2.5-5 ton trucks in military service. The A3 was a special conversion of the common M35A2 "deuce and a half" that used the engine and transmission from the FMTVs and added CTIS(central tire inflation system) to the axles. The original King Kong used a Continental multifuel (typically run on diesel) engine. I'm guessing it's just easier to use a more modern engine than worrying about the temperamental older versions that are harder to source parts for.






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