Hi Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
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smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
From all the sounds of it I forsee some or all of the following to be part of this engine's problems, none of which are easy diagnosis or cure.
*pistons, and or rods installed 180 degrees off
*rings installed lined up, and not staggered - should not affect noise but will affect life of rebuild
* if rings are aligned correctly you could have split liners - presume that engine was bored and oversize pistons/rings used - if not that is one source of noise- you cannot use only oversize rings, but also cans.
A lot depends on how detailed the rebuild was, what parts were used, and even if (horrors) the block was decked bolow valve/piston clearance and that would show as circular indents in piston(s)
I recall that an early B engine can have oil pan removed with engine still in car (by loosening front motor mounts) don't know if same can be done on a A.
*pistons, and or rods installed 180 degrees off
*rings installed lined up, and not staggered - should not affect noise but will affect life of rebuild
* if rings are aligned correctly you could have split liners - presume that engine was bored and oversize pistons/rings used - if not that is one source of noise- you cannot use only oversize rings, but also cans.
A lot depends on how detailed the rebuild was, what parts were used, and even if (horrors) the block was decked bolow valve/piston clearance and that would show as circular indents in piston(s)
I recall that an early B engine can have oil pan removed with engine still in car (by loosening front motor mounts) don't know if same can be done on a A.