If a head has been plained would there be swirl marks or is there a spec measurement from ford that gives the height of a head.
Can a person say measure the height of an outer edge bolt hole from bolt head seat to the machined surface of the head and get a height?
To create a noticable increase in compression, how many thousands would have to be shaved from the head?
I think the guys that do the Montana 500, cc the combustion camber in order too determine how much the head has been shaved
The depth of the bolt holes varies too much to serve as a guide. He most reliable method is to check if there's still an inspection letter stamped right in the middle of the head on the under side between #3 and #4 cylinders.
I think I've set a personal record for posting today. I guess being laid up while recovering from pneumonia has a small upside.
Here's a recent thread covering the high heads: http://www.mtfca.com/discus/messages/411944/462161.html?1405953353
I measured four unmilled heads, All of them measured between 2.680" and 2.700", most of them around 2.680".
Ken Todd and Mark Chaffin posted the dimension from Ford's factory drawing: 2 11/16" or 2.6875".