according to my honda oem dealer connection:

h23a1 (1992) fully loaded block = 109915
h22a1 (1993) fully loaded block = 109916

i know you said bare block, but im basing my statement on my 1994 Honda Prelude Service Manual (1400 pages)

covers all 3 trims, and discuss's the h22a1 and h23a1 as having different cylinder wall construction and numerous other smaller differences.

it is possible the block is of the same forging, and that honda actually sleeves blocks to be used for the h22a1 before assembly.

~boomer