Probe and Coast High Performance are the same company. If you check out Coast High's website you will find a lot of different rotating kits. Generally, I believe their stuff is pretty decent, although I've never used anything other than their pistons (which are nice).
When I bought my 331 kit from Coast High, I asked the salesman which was a better kit...the Probe kit or the Scat kit (they sale both). Remember, this is Probe's company, and the salesman told me that the Scat kit was a stronger kit. I think it was actually a few dollars cheaper, but don't qoute me on that.
