also, the place i had send out my cam to have reground made it a bit more aggressive than i asked for. lift is around .550-.560 and duration is .282/.282. will i run into problems with valve guide/retainer clearance?
I believe that will be a huge issue. I have measured many stock heads including magnums and the most any head I measured would only allow .520 lift when the retainer hit the valve guide. Duration is a non issue. Valve lift is the problem
