Don's insights and explanations are great it helps us understand the Mopar RB and the functions of a great motor. I own both of his books and use them for reference quite a bit. If you don't have these books they are a must have for any Mopar RB hot rodder. I plan on using the ST-H-42 cam in my 440. The "old school' Max wedge builders from the 60's -70's love the Racer Brown Cams. I have also used the Mopar 590 mechanical with much success. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com