The heads, intake and TB/MAF combo should be more than enough to get you into the twelves. However, I'd dump those 3.73's for something more in the area of 4.10's or 4.30's for that AOD. You may find with the new combination that your torque converter needs to be changed. You'll be making quite a bit more HP&TQ so its going to stall out differently that what you're used to with the old combination.
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Jeff Chambers
Trophy Stock #3
11.97 Seconds / 114.5 MPH
Chambers Racing Team