Airwolf 220 Cylinder Heads

RHS, W2, Air wolf, Indy, or the new chinese aluminum heads that Dr. J's uses ported by IMM -OICU812, Mike (MRL Performance) Jim LaRoy (IQ52) would work fine.
I think Indy 360-1 or 360-2 or Brodix, or W9 (W8, W5*, W2) have the most potential for flow, which has to be matched with displacement & RPM-which depends on usage, money, vehicle, weight, rear axle, trans...everyone here is gonna want more data to be able to give you good advice.