1965 Barracuda with 84 318

trapster: thanks for the offer...but we'll learn more trying to figure this one out. good exercise! I did pick up a core 73 318 cheap if I need to take a cylinder head off of it. Same casting numbers as what I'm using.

nm9: There was minimal is any pressure on the coolant system when we pulled the rockers. Definitely raw, green coolant!

I'm going to check the thread holes tomorrow. I' made a pressure test fitting to pressurize the thread area. I'll start at 30 psi (could even use the leak down gauge). I'll see if I can spot a leak into the water jacket and/oil rocker feed.

If nothing.....I'll get the head to the machine shop for a pressure test. But that would be a hell of a crack from the oil feed journal to the water in the head, no?