X heads vs Indy x heads

They are a nice but heavy iron head with improvements over stock.
Pros, nice machined valve cover gasket surface.
did away with the water in the exhaust bolt holes.
cons, I had to extend my alternator bracket to raise above the head from interference and get a longer belt.
exhaust port differs from 340 X heads but seem not to have any sealing problems.
This is 340 info, they used the 360 exhaust port design.
I`m happy with them.