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Yes, brake booster is holding vacuum, did a simple test by using a bicycle pump with pressure gauge and manually pressurized it to about 5 pounds on gauge, and it held pressure until I removed gauge and undid my psycho-rigging of a valve stem and barbed fitting to seal hose to check valve. Oddly enough when I placed the intake gaskets on the heads they fit the ports very well, and also the ears rested on the top of both China rails. I placed a bead starting at the ears and across the rails on the front and rear. Also put a small bead around each water port, and a small dab in the center of each to help hold it in place. I let the permatex set up for a few minutes,then installed imanifold straight down. I think the reason it leaked was because of improperly torquing them down, as I just snuvgex them and gave them a good cinching down. Hopefully, the intake is not warped, but haven't checked it for flatness yet. Also, forgot to put permatex on threads of I take bolts which is why I think I leaked a small amount of coolant into the lifter valley. Waiting on weather to permit, and I will reinstall intake after checking mating surfaces to be true.
...I was turning the engine over by hand to watch the valve operation. I found at least three rockers that I could push down quiet easily by hand....