Stripping a supposedly GTD pump last night and noticed a few anomalies, the most obvious was the cam plate having a very shallow profile. Much shallower than a AAZ one also on the bench.
I was going to swap the cam plates but the foot on the pump was different between the two and I ended up swapping the entire head.
I noticed there were different idents cast into the camplate - does anyone have a reference for these? One was a 004