Hi, so I am about to embark on an engine rebuild and am planning to get a cam regrind. I have an l28 with an n47 head and roundtop su's. I have 2 questions. 1.) I heard the e88 and e33 heads had cams that were more suited to being reground, is this true? Is the n47 cam ok to get reground? 2.) Does anybody have experience with any cam grinders in the bay area? Or if not is delta cams good? Thanks!