SB rockers hitting springs and retainers

Well I compared a stock 340 spring with one from the engine I am working on. Definitely not stock: Spring dimensions (approx) of the unknown springs are:
Surprisingly, the unknown spring has a slightly smaller diameter of 1.406 (vs stock)
Free length 2.375 (vs appromimately 2.0 stock)
Wire diameter 1.8 (vs 2.06 stock).

I wish I knew what brand and model springs these are so I could look up the bind height.

Retainers are stock and even in the stock spring there is a lot of lateral slop between the inside retainer step and inside diameter of spring. Valves are stock and correct length.

I will pull the cam in the next few days.