I'm going for somewhat the same as you... I've got the headers and mufflers, now I'm working on finding a good shop and some pipes, but I've been thinking about an rv cam to give me the mid range. I'll be pulling a 3800lb camper and thinking about pulling hills/mountains on the interstate/highway made me think of going for the mid range. I know you said low end, but it gives you something to think about.
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