Silvia Club of NSW

hey everyone i was wondering if anyone has ever heard of a ca18 high output option apparently it was only avalibale on limited fully optioned models it was only availibale from the factory the main differance is the head and inlett manifold the head has much larger inlet ports nilly twice as big as standard from memory i only ever found one bloke in WA or SA that had any idia what my engine is anyway i may be selling it and i belive its the only ca18 of its kind in australia im tryin to find photos i have from when i built it will post asap