solid roller or hyd roller how much lift you will need to know what cam core you have a one piece steel core or steel/iron gear .or all iron core if you go hyd roller you will need retro roller push rods like comp 7815-16 and a retro roller lifter like crane 13532-16 or ht5010 and a good spring and 3/8 pushods if you go solid you will need roller springs lifters button and heavy wall 3/8 or 7/16 push rods .and could be more you will have to tell me how much lift