Hydro-idi
Full Access Member
Measure both the valve depth in the heads and the piston protrusion from the deck. If the shop has no idea how or where to measure the head thickness please find another shop. I say this kindly. I do not know the shop or what they can do. They may or may not know about valve recession into the heads. I can loan you the tool to easily check the piston to deck height. Just pm me.
Thanks for the generous offer Gary! Might take you up on that but I might try a straight edge and feeler gauges first & see where that gets me