DrewP, Thank you for the compliment,
The 66 has a 3.73, I'm an avid do it myself kind of person. I haven't done much in the way of auto mechanics but it seems simple enough. I'll have to look more into the T5, all I know is it's a 5 speed, and a "newer" model as it doesn't have the speedo gear, but a plug.
Wrenchbender, I have a 235 engine.