Motown,

33/34 . . . with 'glass replicas, who can tell? It's titled as a '34.

Based on what you describe, I would pull the timing cover. Maybe wasted time, maybe not. It's not hard to miss it by a tooth - even by someone who does it every day. I would also install Edelbrock's timing chain & gears straight up. They may be recommending that in order to sell parts, but I doubt it.