Rocker shaft orientation?

I know nothing about banana grooves. And the factory rocker-arm oiling holes, to my knowledge are off-set only a few degrees; Ima thinking something like 5*?
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*.
That's what I have had to do a few times, to get the oil holes pointing in the correct direction. Last time it was with shafts that came with some Comp Cams rocker arms. Never had any issues with proper oiling (that I know of!). Car is still running fine.
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------