Update, preasurized cyl. #1, would not hold, air leak but indeterminate internal area. rate of preasure leakdown suggests no cly wall coruption. system used was to only pressurize the cyl. That had to be the only probable path.
Pulled head, discovered head gasket failure/wrong? unknown.
Ordered new correct(Hope) head gasket to be installed near future and try leak test again before adding water, with cold engine not running and all valves fully closed.
Head gasket appearance supports water leakage around bolts 10,2 12. The ones slightly under the rocker arm. suspect water forced to the head and flowed down through the pushrod tubes, oil drain holes to pan. The gurgling when I first put water in was most likely caused by the air in the cyl head and radiator being forced out by the water and eventually to the pan. Believe this to be the case and likely. One reason is the location of the radiator fill neck is roughly a foot above the head to block mating area.
Another thought, are the head bolts that pass through the water jacket supposed to be sealed with something other than the head gasket and on the manifold side a copper 'washer' is around the hole in gasket? On the lifter side there are 'steel 'washers'. The bolts for 10,2,12, no 'washer', just the head gasket. Those holes are blind, not into the water jacket.
