I have a 1952 Unstyled 99 Oliver with the 4 cylinder Waukesha. I started tearing it down, and took the Rod caps off, and it doesn't look like it has a bearing? Is it one piece? If so where do I get new ones? They have some small cracks and one has a small hole, so I'd like to replace them.  Also, I got a couple pistons out and they are M&amp;W Add Powr pistons. Any one have any info on them? The pistons look almost new, just wondering where a guy could get rings? Would stock work or not? Any help would be great, the more info I know about this motor the better. Thank you.