I will try to explain. i just got my head back from my 350. i see the push rods, the rockers, the studs and bolts and these little things that i cant figure out. they are about 1-1/2 inches tall cylinders. one end is totally sealed and covered but the other end appears to have some bearing held in by a clip. i assume it it part of the head or rocker assembly. if you have a clue what it is or where it goes please let me know. the head is not new it was pulled off my old engine by my brother. long story. where do the lifters go?