Depepding on the size of your cam and compression you are probably running over 500 torque. Heck I have seen a 434 roller SBC with 14:1 only make 550hp but over 600 torque. Bigger cube engines don't make that impressive of HP but they make a lot of torque. My engine is not a torquer and I wish it was because my Chevelle is HEAVY.
For porting I only use air tools because they are a lot more controlable. For bits I use what I call a "tree burr" I don't know what it's really called. An electric dremal will work but they are kinda hard to be precice with. I have some porting pics somewhere around here on a disc. I'll post them on -my website-
Yes I felt pretty bad about the 4 wheeler blowing up I went and talked to the guy and he blamed it on his son.. ha ha