I've used 2. Both were behind mild 440 B-body cars. 3800+ lbs. One was behind a 12.0 car and ran perfect for man years. I have 3 friends that also run them in mid 12 second 440 B-bodys. Zero problems. They were a steal at $138 back in the day.

[IMG]http://i66.tinypic.com/pui5j.jpg[/IMG]
Coming soon!!!!