tryin to break in new engine, ruff idle

i should have read all the post so if im jumping in and the wrong spot scold me. when you put a cam in with higher lift the base circle of the cam gets smaller dropping the lifter deeper in the bore this makes it have to pump up more the normal and that with a valve not sticking as high as stock(due to new seat or the valve being tipped) there may not be enough lifter there to make up the gap.at this point an adjustable rocker might fix it but probably the better way is to put a long push rod on the engine or maybe both