patrickt,
I am befuddled as well. Here is the way I determined the problem.
I reinstalled the
oil pump and took an old
oil pick up and cut the screen off. Then I installed a hose on the end of the pickup and placed the other end in a bucket of
oil. I then had my brother in law attach a drill in the revere motion to pump oil thoughout the block. I noticed seepage from the crank and cam but in the rear of the motor was Niagara Falls!!!
I removed the tranny and clutch. Removed the allen plug and there it was installed incorrectly.
Now if you remove this plunger setup from the back of the block I am believing you will have a major interal oil leak like I experienced unless you insert a cylinder the size of the spring or plunger to block the holes in the block.