Im nowhere near as experienced as some on here. But you did say money is not of a big concern. Instead maybe take those original heads off and shelf them if you sell and need original parts. Then get some after market heads. You can choose cast or aluminum. The aluminums are more forgiving on the compression and can typically run 1 point hight on pump gas than cast. You can get the heads they way you want, the valve sizes and stems you want, and even mill them for compression. Bolt them on and they will most likely flow a hell of a lot better than any work you put into your old heads. Maybe a set of Edlebrocks oval ports with 110CC chambers. Maybe Brodix race rites or ARFs heads. JMO. Im sure the experts on here can elaborate on this better than I can.