Custom Cometic head gasket pics

famous bob said

yeah, we (I) kind of screwed it up. I like the mods myself. I did it to a street n strip engine, it helped cooling , helped filling w/o air being trapped, made the plug color more uniform. I did tie the tapped in lines from the rear of the intake water passages to the spacer I built to go under the thermostat. I was running a stock type alum water pump tho, and drilled and tapped the holes between the center cylinders.

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Interesting that you saw more uniform plug colour. There are a couple of benefits that have been pointed out to me in this thread that I was not aware of. Longer valve job life and plug colour.
Yes the small 1/8 inch hole drilled into the pipe plugs that are threaded into the block are to prevent an air lock. That is also why I had cometic add the small 1/8 hole in the gasket to match with the hole in the plug. I was very impressed with the help I received from Cometic gasket. It was my first time dealing with them and they really can make a custom gasket for very reasonable cost.