[TR] oil pressure more info

[Gary Nafziger]

problem is zero oil pressure.  I've blown through the oil line from block to
guage, ok. took apart guage and seems ok.......can't blow through that.LOL 
taken off oil pump and it looks good.  tang is not broken or twisted.  tang
measures little over 1/4 of an inch on end of pump shaft.  It fits up into
slot in the drive ok.
my question is............is it possible for the
dizzy.......(or the drive off the dizzy)..... to spin on the oil pump shaft
without seating in the slot?   because i had the dizzy out of the car and back
in just prior to the drive where i noticed no oil pressure.  since nothing
seems to be visibly wrong i'm thinking that might be the only reason.
thanks! 
thanks in advance
gary n.