I replied to your post and yes, that things hauls ***! Very impressive for a first outing.
Have you driven it on the street? Driving my car on the street was fine and around town, the 4.30 gears that I had before were fun. Putting the 4.10 gear in made it somewhat reasonable on the highway.
What is your support team like - gears, converter etc. As I stated previously, I'll probably be getting a new converter. It will be a no-brainer since the block will be coming out. I know you have a 4 link type chassis, I have stock suspension with Caltracs.