Thanks. I probably should have mentioned that I have a Lycoming 0-235. I am not sure if it has hydraulic lifters. I think it has solid lifters. If solid lifters, then using a dial gauge to "map" the lift on each cam lobe should be fairly easy, unless I am missing something. Is anyone aware of Lycoming data sheets that specify the allowable limits on the cam lobe lift profiles? Is there more to this than I am thinking?

if the 0-235 has hydraulic lifters, then I need the procedure on how to deal with the lifters, so the hydraulics don't impact the dial gauge when mapping each cam lobe. I can't find this procedure in the referenced materials. Any additional ideas, references?

thanks, Wayne