Does your 235 still have the babbitt rods with the splash lubrication for the rod bearings? Instead of aluminum rods are you looking for rods that have been modified to accept insert bearings?
Chevs of the 40s (and others) can provide rods with insert bearings. Or, are you considering a conversion to full-pressure lubrication for the rod bearings? Egge offers a
1952 rebuild kit for a 235 for $1700+ (enter CB503 in the "Part Number", and then click on CV235M50-52; that is how I was able to get there; there may be an easier way - like just calling EGGE. Their website says to call for picing about the rod bearings.
I would follow DrewP's advice, and order the parts you need after the block, crank, etc. have been cleaned, inspected, and machined. The rebuild may need either more or fewer parts that come in the engine rebuild kit. However, it's possible that the Egge engine kit (for example) may be the best deal. The research is always fun when rebuilding an old stovebolt.
Hoyt