MBHD, the design of the head limits the valves to 1.85 and 1.55 respectively.As for flow #'s of a worked head we don't have any yet that I know of .The heads that are being tested by some of our customers are straight out of the box because they were in a hurry to get them on LOL.Also the new intakes are desined to work with the new head as of right now those being run are using the stock Aus 2V intake with a holley adapter or a modified one to accept a small holley4V. I can also say we are planning a new head for the Chevy six with the same goals as the Ford head.I would suggest sending any imput to Mike so he knows what you folks are looking for in a head. Rich
