[surfbeast]

if I remember correctly there are two sets of heads, One is the windsor heads and the others are romeo heads. the romeo heads have eleven bolts and the windsor have twelve. Cant remember exactly but I belive the romeo heads are the better set of heads. This came out of a 5.0 mustang mag from about three months ago that explained the two head types. IE - same engine but two different valve cover bolt patterns.

Hope this help, my memory isn't the best!!