The banana grooves include oil holes in the center that spread the oil out inside the rocker surface that rides on the shaft. There is another set of oil holes in addition to these that are the ones I believe have to point toward the springs. Unsure of actual offset but seems like more than 5*.
Yes, keeping in mind that this is a 1967 273 probably manufactured in 1966. I am dealing with the shafts, rockers and adjusters the car was born with which means that it was assembled wrong at the factory and was incorrect for the 72,000 miles it ran before I bought it and tore it down. I guess I will swim upstream and do whatever it takes to point the oil holes outboard to the springs and cross my fingers! Thanks for all the help all-----Dr------