You’re right. I have 72 motor. I believe the 360 stock pistons were dished, but I would have to confirm that. Looking at it now. The best thing to do would probably verify cam, pistons and go to that same engine builder to ask what he suggests on the combustion chamber size of the new heads. I would want to do this to avoid replacing the cam and the pistons for the time being. I’m totally capable of installing both and I have a garage. But, the whole reason in wanting to take my original approach was to avoid pulling the engine for the time being. Which is what you have to do to exchange pistons and probably cam too. I’m capable of exchanging parts. But, sometimes people have reasons for approaches that may differ from someone else. I personally had this engine nearly completely disassembled and put pack together and runs a lot better than when I bought it. But, I’m no performance builder.