I'm born on May 1st so that tells you I'm Taurus, stubborn, calm until pushed but loyal to the extreme. I'm a Cleveland lover, big admirer of Jack Roush and I won't part with my 351C stuff. Two motors is not a collection but the second one is what I call the big one. I have a set of 4v heads with the small combustion chambers. Being a die hard I decided that I was going to do my own High port plates. As most of you know these Boss style heads are great but because the motors were fitted in smaller vehicles the exhaust port takes a sharp turn downward to facilitate the installation of the exhaust. The shock tower was very close and the story goes that the dogleg in the exhaust port hurt power, The solution was to mill a section of the head and install port plates that would raise the port and eliminate the dogleg freeing up some power. I followed what I read and if it's good enough for Jack Roush then...
The pics tell the story. I still have seven ports and spark plug recesses to do. I could have sent the job to a shop to be done on CNC but this is personal and it keeps the mind working. All the information came from Ford Performance written by Pat Ganahl. I don't have a mill so I took the heads to my engineer Geraldo and showed him what I wanted. He milled the heads, cleaned up the Aluminum plates and drilled them. ARP sells a set of longer studs that are used on that side of the head. There is an area in the exhaust port at the top that needs to be contoured to get rid of a bump that's still there even after milling. It's recommended to finish up with a D shaped port but I figured that with the turbo thing it won't make a difference. I did the port and plug recess on the drill press and semi finished them. These parts have been gathering all the sanding dust from doing the bodywork but I've promised to do one port and recess a week.