I'm sure the blower guys could give you better advice but I'll take a stab at it. For 10's you're looking at MPH in the range of 126 to 136. If you've got the capability to spin the motor high, then the 3.73's would be the ticket. But if you're still running long-runner intake and shifting below 6500 then I'd go with the 3.55's. They may not hit as hard as the 3.73's, but you should be able to overcome that fact with the monster torque and hp you'll be making across the entire rpm. You ought to jump over to funford.com and as the same question out of the blower guys in the Renegade class. They've probably been there and had to face the same decisions.
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Jeff Chambers
Trophy Stock #3
11.97 Seconds / 114.5 MPH
Chambers Racing Team