I am not going to pretend that I know anything about this engine.I think that the pin is too big to use the 261 rod? but what about later model 235 rods? Will they work? There is not much going on right now, give me a number that you are looking for and/or what other engines' rods will work and I will keep my "eyes open" for parts. Jay
Since he is limited to using the babbited rods, that is the only style he can use, as the later insert rod is not compatible with the early crankshafts.
Stock49, the weight variation in the rods, even with the same part number is just the nature of the beast. It is normal to have a 10-15 gram difference in a matched set of rods, except in aftermarket rods where the manufacturing processes are much more precise.