Not an auto guy, but I think your tranny won't be too happy with 4.10s unless you get a chip and/or shift kit. Autoguys with gears can confirm or deny this, because I'm not 100% on that.
The H-hipe (or X-Pipe) is a good idea, and I had good luck with my MAF even though it is rather pricey.
With all that, I would guess that you would be somewhere in the neighborhood of 14.0 give or take.
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