Matt

Just as an FYI; obviously you've seen the pictures of the AY head and notice the intake valves are canted at around a 30 degree angle and the rocker arms are slightly different than the standard A-Series rocker. Well by happenstance I have an E15 turbo head and I noticed that the E15 vlalves are about the same angle and consequently the rocker arms appear to be nearly identical to the intake rockers pictured in tech wiki for the A12 head.

Also I notice that one the AY head the plugs are where the intake ports are on a standard head and the intake port is where the plugs were. I wondered it was remotely possible to modify and existing head. Install a valve seat in the plug hole and weld on a port and simply put the spark plugs down the intake port.......easy peasy.

On a more serious note any idea of cost? A cross flow head appears to be worth a 25% increase in power perhaps more so if the price is doable it'd be well worth it. I'm also assuming the cross flow design allows for larger valves than a standard A-Series head.

My race class would allow me to run one of these so I'm keen to see what you come up with.