Fel Pro 1003 Head Gasket Coolant Hole
I assembled my 327 and installed it in car. Not started yet. Long story but I pulled the heads and am installing new Fel pro 1003 head gaskets. Instructions say to drill a 7/16" hole in block between center cylinder exhaust valves if hole is not in block. Mine doesn't have holes. I've done some research and it seems almost universally recommended. My problem is engine is assembled and in car. How can I drill these holes now without loading the coolant passages with metal shavings? There is no way I want to pull the engine and take it apart. I was thinking I could drill it and vacuum most of the shavings before I break through and then use one of those antenna deals with the magnet on the end to reach down the hole to collect the rest of the metal shavings. I don't have any other ideas. Is this hole really necessary? The block has the two smaller holes to either side of where the new hole would be drilled. This is a street car. Any suggestions? Thanks.