Quote:
Originally Posted by BruceWilkie
Only concern I see is the spark plug hole location shown in the chamber pics on the first page. Unless I'm seeing it wrong, it appears way too close to the exhaust valve and seat which could become a serious source of very destructive preignition events. Its not a cool place for the spark plug!
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Ford Tunnel Port Heads cracked in that area from being a SOLID cast iron head.
Aluminum heads might be a bit safer. If someone had a "partial head" I would be cutting around that spark plug to see how much water was there. Minimum water passage size around the spark plug, on an aluminum head designed today is 3mm (around .125" for people not used to the metric system).
I would find out that answer VERY QUICKLY
Tom Vaught
ps ASSuME that Edelbrock Engineers have the knowledge to follow that general rule.