565BBC w/ Dart 320's and a small roller. The T4 based 76's come on real hard to 6k. We run 9lbs max on the street and won't know what power it makes until we get on the dyno in a week or two. Still working out the bugs.
I have one more question Dennis, did you measure the diameter of the M&H tires? They list it as 29.5" tall, but then again it isn't a true '390' either if it can fit on a 17x11 wheel. I wonder if they aren't as tall as advertised?