I have one with pred heads that made 1200 on a single 4. I've since added a tunnel ram, and the car picked up mph, so I know it's making some undetermined amount more than that now. The car is 3400 pounds and runs high 5.20's to low 30's based on 60' which is rarely the same. sometimes it's 1.169, and other times it's 1.22 or slower on bad hits.

I've seen no signs of stress problems at this power, but blower torque may be a different story.

I would stay way clear of their aluminum block with a blower. Running over the crank doesn't sound like any fun at all lol.