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Well tuning for MPH in a 5200 pound 4x4 is well exciting. We can do this but looking at some dyno time maybe next weekend.

For what its worth, my 2-cents.
Assuming it is running on gasoline...
I would aim for about 12.2 at peak torque and 12.8 at peak horsepower. Drag race applications can often make a few more HP slightly leaner than that, but I like it a little rich (low 12's) lower in the rpm range.

These are just targets, and every application and engine may like slightly different.

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1