in my 331 which has a hydraulic roller cam (Comp Cam 280 H)? I was looking at MSD distributors and they make one for Ford 289/302 engines with hydraulic cam only problem it has no vaccum for my Holley carb (vacuum secondaries). I thought I read somewhere that an iron gear would be eaten up by a hydraulic cam. Should I buy a MSD distributor that has vacuum advance and change out the gear to a steel one???
