Yea you might be better with a diesel but maybe the inline six. Everyone talks about how the inline 4's are underpowered so going up the mountains may be tough. But for a 60 ztr and 48 wb and 2 21s you really only need a 14ft box. The 6.0 gasser would be a good choice I think. Or whatever you can find a deal on. I don't have any in the mountains so im lucky.
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