IN TERMS OF STRENGTH..
early r32,r32/33/34 same n1,groupA.
also a old 200k old 32 or 33 block is stronger than a new n1 block. due to the weathering proces of heating up and down for the last 15 years.
you wont have any issues. unless your making in excess of 1000hp. on a block thats been bored out more than 40thou.
splitting blocks is usaly the result of localised hot spots in the cylinders. thats where block preperation comes in to it.