Here's a thread on a T5 swap http://www.nastyz28.com/forum/showthread.php?t=228456 Keep in mind these transmissions are weak and if your son beats on this it won't last long. It's not worth the effort to install a T5 imho. I'd rather save the money for a T56 or a TKO-600 5-speed then do the swap.
71 RS/SS 396 Resto-Mod
Placer Gold Sold