I think you will find that there is a head-side and intake side orientation and the gasket which only fits the hole pattern properly with one of the two possibilities.
When I was doing some intake development work sometime ago, I learned that the center two holes (the 5/16-18 ones) are actually not equidistant from the other 3/8" mounting holes. Lay the gasket on your 4V head and then flip it to change which side of the gasket is laying against the head and you'll see what I mean.
This was done for reasons know only to Ford but it may have been purposeful to confound the afternarketeers, to miss some other feature in the head, or just plain lay out error. Those holes are about .1" off center by memory.
|This message has been edited by kcoffield from IP address 188.8.131.52 on Apr 30, 2011 9:11 AM|