My current 518 C.I. S/P bracket motor had both pushrod oiling and spray bar oiling for the Jesel paired shaft rockers on the 440-1 heads, I ran it that way for a while and ended up removing the spray bar covers after having a lot more oil get into the vacuum pump with the other motor in it for five years with full time oiling to the Harland Sharp single shaft rockers restricted to .040 to each rocker shaft.
The Jesel paired shaft rockers oil straight through the adjusters with no oiling provisions to the shafts or roller tips, Jesel tech. said it will oil fine with splash oiling only to those parts It has so far shifting at 7300 RPM and crossing the finish line in the 1/4 mile over 7500 RPM Ask Harland Sharp to use pushrod oiling adjusters in your set If they won't you can buy them direct from Manton, I'm a Manton dealer also
Try it first and see how you like it and then decide to keep it both ways or not