Should I swap in 4.10's for my 3.73's- please read

[Killercanary]

OK, I have an extremely heavy 95GT convertible. The lightest the car has ever weighed when it was pretty much stripped was 3510 without me, or 3680lbs with, but it is normally over 3700 with me. It even weighed in at 3803lbs with me, a lot of gas, and some luggage at Englishtown NJ last year on a 97.2mph pass. Anyway, I just got a set of 165 AFR heads for it that will be milled to 55cc's by Ed Curtis and he will also custom grind my cam for me. He recommended I go with 4.10's in my car with its weight and the cam.
Now, this week I'm having my traction lock rear redone with new clutches and its costing me $65, but a gear swap will only run me about $95 from the same guy, so I figured what the heck, it won't cost much more to have it done now. My cousin also has a set of 4.10's with about 2K miles on them that I can have for real cheap. So should I swap in the 4.10's now since it seems to be the perfect time to do it, or will they be too much for my street car that is a 5 speed? Right now the car is daily driven, but since I got a new job I'll be buying a new vehicle and retiring the stang to nice weather driving. My goal is to have the car trap at around 105mph+ and with some luck maybe break into the 12's. I alsi run Nitto DR's as my street tires. Thanks, I appreciate all input on this.

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95 GT convt' 5 speed, 3.73's,FMS HD clutch, Pro 5.0 shifter, ASP alum. underdrive pulleys, Bassani offroad X pipe, 2 chmbr flowmasters, K&N w/o silencer, edelbrock performer intake, FRPP 65mm T-body, FRPP shorty headers, FRPP aluminum driveshaft.Hooker 4pt chrome car bar, Xenon/Wings West ground effects, custom interior
Best ET: 13.83
Best MPH: 98.55mph with Best 60': 1.91 on Nitto DR's
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