I used clevites in my engine. I know FM makes a wider rod bearing and some of the guys around here that seen to have a good bit of experience use king bearings. I think the clevites would be just fine though.
I used King on mine, had a guy that use to work at an engine builder here in town and he said that king bearings where more correct on there size. sometimes he would see other bearing that where thinner on one end or in the middle.