pushrods

If it's just preload you want just install them all with the rockers and shafts, and when each lifter is on the base circle of the cam (not on any part of the lobe's ramps) use a wire-type feeler gage and see what you have for preload on them. It vary depending on the accuracy of the deck and head surfaces so youshould check all of them. You don't have to be exact - for stock type lifters the specs are anywhere from .020-.050+.