Nothing rare about that intake. It can still be purchased new from Offy.

The small ports up against a gasket matched intake port onthe head? It should provide an anti reversion effect.

As for the 920 heads? I have a set also. I was thinking of bolting them on a 360 or 318 for a MPG mild motor.

Should we start a 920 head thread?

"The only thing to do for triumph of evil is for good men to do nothing"

"NUNQUAM NON PARATUS!"