All, Last year I did the conversion on my 521 crate from a solid roller to a hydraulic roller and have been pleased. However, I ate thru the brass distributor gear in about 1000 miles. installed a comp cam (I don't have the specs with me but nothing out of ordinary) and I am running the HV
oil pump. I am wondering if that is what is eating the gear. Prior to cam change I changed out after 2500 miles and still had some room. Ideas?