Drilling oil galleries and oil return holes?

Don't forget to give the rear main cap some help at the sharp corner, and get rid of the 90* adapter.
With these mods,and some others, my 367 has been running up to 7000/7200 regularly, since 1999. The last time I did a refresh was 2004. The used bearings went back in, and now have over 100,000miles on them.