connecting rod interchanges

I've got a long story that I can tell if anyone desperately wants to hear it, but it will end wuth the same question:

When did the connecting rod diameter change on the crankshaft? 225 rods will not fit on an 231 even fire crank shaft, but will 231 even fire crank shafts fit on a 231 odd fire crank shaft? I do not have one on hand but would like to confirm / check this before buying this part.

Also, when did the deck height for the connecting rods change? My 231 odd fire rods are not the same height as the 225's. I can't remember the distance precisely, but the 225 connecting rods in my 231 block leaves ~.25" from the deck to the piston at TDC (compression =120 psi after a single stroke, not pumped).

Just to keep questions somewhat to a minimum, I've got an oiling issue that can be described as a rod being out of tolerance in diameter, and close to it on lateral play (on fresh machine work). I have a set of 225 rods and a crank to use as a spare, both would need work (from a different shop). At the same time I have a reconditioned set of 231 rods sitting next to me, known to be from an 84 olds cutlass. If I were able to buy an odd fire 231 crank to fit the reconditioned 231 rods I would have a stronger crank at the rod journals and keep my spare 225 setup for another project I am planning.

Any help with these dimensions would be greatly appreciated.

 

n/m bearing number shows the same part from 76-89 on 231 motors. Judging by this the journal bearing diameter changed in 76 to go alone with thr 225 being bored out to 231 ci. We'll see if this is right...