| After my rebuild, I pulled the plugs and cranked the engine for an uncomfortably long time without building any pressure.  What I ended up having to do was use a shop vac to pull some oil through.  I pulled the filter adapted a piece of clear tubing to the vac that was tight fitting to one of holes in the filter tree (don't remember which one).  Then I cranked the engine while my son ran the vac and told me when oil entered the clear tube.  After this I reinstalled the filter and it built pressure nearly immediately the next time I cranked it over. Maybe I just gave up too soon with just cranking the engine, but this worked for me.  In case you have trouble too, give this a try. 
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 90 300zx TT        12.731@114.00 94 Camaro Z28    13.751@101.83
 03 WRX              13.973@94.88
 02 Mazda MPV; four kids and a wife don't fit in the Z.
 90 240sx (sold)    16.9@87
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