Engine combo advice

Thank you again for the input, facts and opinions!! I do live at 5200 ft, but it only takes about 10-15 minutes to get to lower land, so my tune will have to either suffer at altitude, or maybe have a happy medium. If any of you are ever in So. Cal, the Rim of the World scenic highway is not to be passed up.

That's one of my favorite ways to get up to Lake Arrowhead or Big Bear. From home I take the 605, to 210, and then get off Waterman and take that up all the way. It's super beautiful on a clear day (which doesn't happen too often). Even on a not so clear day, it's pretty nice!

After I get my Duster on the road, that will be one of my destinations.