Harland Sharpe Rockers

That would be new to me. Randy Becker (Harland Sharp's nephew) and family own/run Harland Sharp since the '80's and I've talked to them at the races last year. I got 2 sets of rockers earlier this year and was in contact with Randy jr.

http://www.harlandsharp.com/history.htm

I ran them on my W-2 Challenger years ago. Thousands of runs and took a beating from other stuff breaking, but never had a problem.