Fully groves mains
If you read the article, it states by full grooving it is bad for the main bearing, but good for the rod bearing. In my case/application, I had issues with rod bearing failure (particuly #5). The mains on a slant six, are the same size as a Hemi. Also rotation speed of the crank, has an effect. Once I started doing full groove mains, I had no more bearing issues, and I have turned some my 170CID engines 7,000 rpm. I am not arguing for or against full groove mains. Just stating what worked for me (in slant sixes), for over 40 years.
PS: I also do not believe in high volume oil pumps on the slant six.
PPS: your results may vary
