If you wanna go affordable, get the Elgin or comparable roller tipped rockers for now. There are many who supply this style. Elgin happens to be cheaper in price in most locations, or mail order. Just double check roller contact point on the valve stem. You'll afford the "fix" until the next swap time. And I like 750 cfm, but I think it's a bit much for your combo. Let's see if others agree or disagree. Good advice on this site.