stroker damper

My 2 cents, and I've said it on other posts about this subject - go with ATI Super Damper. I ran one on my 4 cylinder mini-stock for many years. You know how those things vibrate. I turned that engine at a steady 5000 to 8000 RPM's all race, every race. We pull down the engine at the end of every season. Always see next to no wear on main and rod bearings, and the engine runs a LOT smoother throughout the RPM range. We've never had an engine failure. That's why I put one on the stout 340 I'm running in my 73 Sport.