[RICK LAKE]

crenbbf Cren you can do a cleaning up yourself. Chan has it right. You need red or blue machinist dye and paint the ports. Put the gasket over the manifold and scribe the line out on the side of the gasket. Big thing here. Make sure the gasket doesn't move. Center the bolt hole on the manifold also. Grind out within 1/16" all the way around the port. DON'T worry about the bottom of the port, ( it is dead air and has low flow ) 1/4 up to top 1/8" is where the major flow is. You want to remove little as possible to match. Go into port about 1" and blend the port out. Have to watch the pushrod channel. There is not alot of metal to grindout. Sand smooth the port when done. If you can get a inside caliper to check port metal thickness. I don't know what the max thinness is but guess about .075". I know that head and intake manifold ports make up templates of metal or cardboard to keep unified from 1" in the port and have 2 or 3 to the out side of the port. If you do make like the pushrod holes, welding and installing sleeves to seal from a vacuum leak is possible. I have this done on 1 of my manifolds. Others here have the same thing to get max flow out of an intake. If worried. go to a junk yard and get a crap manifold of anything and practice. you can get used to the grinder and the bit you are using. This is not a 10 minute job. Will take about 1/2 hour start to finish. Stay inside your lines. Good luck. Rick L.