c/o=oils cam then crank....just like all FE's
s/o=oils crank then cam
physically is was mainly to keep bearings alive during racing because of two reasons. 1 the large diameter of the Fe rod journal pushed
oil out under extreme load2 this was exasperated by the use of steel cranks..made that even worse. basically a bandaide for a design flaw in my opinion..
other than emotion there is no need to actually have the sideoiler with the introduction of small journal cranks.....and to piss off some enthusiasts, i think putting a sideoiler in a replica is a waste of a sideoiler...they should be raced.....use the marine and c/o blocks for street cars.....they are more than adequate, the sideoiler does not offer any street performance advantage
now for the fine print disclaimer............
i'm sure the sideoiler gods will start spanking me but this is my opinion and it will remain my opinion regardless of others disagreeing with me.