magnum heads mistake.

I have an older 360 block with later model magnum heads on it, I wanted to change the cam in the motor , so, I did , what I didn't know was that on the later magnum heads the rockers are oil fed through the push rods, big mistake, wasted all the pushrods , rockers and of course I also now need the correct lifters, so if anyone does not know this , order lifters for the magnum heads or believe it or not , amc lifters, if this is common knowledge to everyone else just ignore , if not use this info and save a pretty big headache.