Is going to roller rockers worth the money for w2 heads? I have a set of flat tappet rockers on the motor now with over a 600 lift flat tappet cam and was told that the finger style rockers aren't meant for that kind of lift, rpm, ect because they were desinged in the 1970's. I was wondering if those rockers are hurting performance by a good amount or don't waste the time and money for rollers? I am looking into a cheaper set for the w2 heads called crane gold roller rockers. I guess they need machined because they don't come right but are meant for the w2 heads. I guess it beats spending an extra over 600 dollars for the next cheapest set of harland sharps..