Welcome to the site 
And yes, a trans-go hd shift kit, corvette servo, and Nelson tune will definately help you on your way to a stronger tranny. However, depending on how bullet proof you want those trannys will decide on how much you end up spending. There are several guys such as Hitman X, that could tell you a list a mile long that would improve the life and performance of your trannys.....it really just comes down to how much money you are willing to spend.
Ron
FOR ALL YOUR WHEEL, TIRE, AND ACCESSORY NEEDS
CONTACT: EPLEY'S TOUCH OF CLASSIC 1-270-843-6892
OR TO GET ME PERSONALLY CALL: 1-615-943-6514
2000 Chevy Silverado 4.8L RCSB: smoked UPD, Flowmaster exhaust, De-screened MAF, Nelson 93 hot tune. Upcoming installs: trans-go shift kit, Eaton posi, billet servo, ported and polished throttle body...Near future: 6.0/4L80E install with 150 wet shot