360 oiling sytem help?

have some questions about the oiling system , on a 360 , say comparing a 1980 block and a 1991 block , does the oil follow the same path? i have adjustable rockers and solid pushrods on my truck motor, which is a 1991 360 roller block , ,i think the older smallblock the oil flowed up into the rocker shafts and out onto the rockers , someone told me the rockers on this motor get lubed from the lifters to the pushrods so i cant run the solids? is this true? is there a difference?have read alot of differing info on this, the truck has a 91 bottom end with edelbrock performer heads which use adjustabel rockers, shaft mount, i have read that 92 up engine were the magnum engine which the oil flows up through the pushrods to the rockers and pre magnum was fromthe top down , but have also read that if you want to use old style heads on a newer block there is a boss you can drill out to give the oil flow to the rockers, anyone know about this enough to shed some lite on my issue?