I have a set of standard cam bearings from speedway installed in an 8 BA. I went to install the stock cam back in it and it will not go in at all, so i miked the journals and they are in spec.1.797. I checked the bearings and they are showing 1.790. Is there a chance that these bearings are wrong? The are Melling bearings pt.# F-1, which says interchanges with SH21S