'89 200T block question

[DePenning, Charles [EPM/MTN]]

I recently acquired another donor patient, a late '89 200T (MC2) with a
'ventilated' block- #1 rod broke and poked a hole through the case right by
the ac compressor.  I'd like to use this as a donor vehicle to provide parts
for a '89 90q turbo swap.  The question is a matter of block
interchangeability.  Could I use the block from the 90q, hone it, drop lower
compression pistons in in place of the 10:1 pistons originally in there and
be done with it?  Or is the block for the '89 200T sufficiently different
enough that it would not work?  I figure there are the oil-squirters for
piston cooling, and maybe the bosses for the dual knock-sensors are not
there.  Any other differences (like the displacement?) that I am
inexperienced enough to not know about?  Would this be FrankenAudi?

Or, does anyone have an appropriate block that I could take off their hands
on the cheap?

TIA!

Charley DePenning

'01 XJ
'89 90q
'89 200T
'84 4kQ
'83 5kT
'73 C10