Well I've researched some good and some bad concerning the copper gaskets just like there's good and bad to almost anything. We ran the standard gaskets on this car for years and never ever did anything to it but change a few bent push rods out which was par for the flat tappet set up. Until this one day we/I creamed some thrust bearings and main bearings which started this whole rebuild and valve train change over to a roller. The coppers are on there now -
We've just removed the intake and located water below the gasket which could be where the water was coming from but I do t believe it to be the entire problem.
In addition, we've contacted the builder and he is extremely concerned and willing to help. He didn't install from the intake up to wiring vacuum lines and electrical lines - we did that. So we started there.
If the heads have to come off - the coppers will definitely be changed out. These TB don't need any additional drama added to their already uniqueness!