312 Interceptor reverse rotation-cam timing question

[bosboy302]

Working on above engine. Gear driven reverse rotation cam. Trying to verify cam index info. What timing marks do I look for and how should they be aligned? Thanks

 

[makomark]

FWIW, the few Ford blocks I've seen in marine applications use a chain to drive the cam...and they typically use dots on the sprockets that you line up (or match) when putting the chain on...I have never seen a Y-block in reverse rotation configuration...I would suggest you tap the knowledge base as www.y-blocksforever.com - there are a few members over there that have first hand experience with the Marine applications....