Ok, this is probably a dumb question but wouldn't it be easier to simply disconnect one of the lines off the oil filter & turn on the engine? Seems to me that I'd see oil either spurting out of the line or the block depending on whether it's full flow or bypass. What am I missing?

~Denny
1953 Chevy 3100
w/1960 261 cid, 848 head | Weber 32/36 progressive 2 barrel carb. | Three on the tree & 3:55 torque tube | 12 V w/Gener-Nator & 6 V starter
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1998 Chevy Suburban 350 ci awd/4wd