Join Date: Feb 2002
Location: N.W. Washington
unless you plan on idling around town daily for hours on end, don't worry about the steam holes. they were there for cars that spent thier life idling, (i've actually heard under 1500rpm continuous) and never had a good steady flow of coolant moving around the block, esp. at the siamesed area. thus creating hot spots and steam pockets.
none of my half dozen or so buddys or myself with 406's have ever drilled them, most of our cars are street strip cruisers, but we have all driven them extensively on the street as well. mine runs 180 all day, any weather, with a 3 core copper brass radiator.
as for your steam hole issue, just run them and the gasket will take car of the rest. mines the same way, only holes in the block. they will seal fine.
of course, as always just my opinion from my experiences.
good luck with it [img]graemlins/beers.gif[/img]
1968 rs with an old school 354" SB2.2 pump gas motor.
Repetition does not transform a lie into a truth.
Franklin D. Roosevelt