Hmm....just gonna leave this here...
Scott, I see that you quoted only part of my statement. I didn't mean to imply that nobody can give the OP an idea of what level of manifold vacuum can be had with any given cam, (especially if they themselves have used that same camshaft in question, which BTW is what i previously stated, but you chose to leave out that part of my post when you quoted me).
I thought I knew a lot about camshafts until I communicated several times through email and through this board with the late great harold brookshire, (AKA "UDharold"). That guy enlighted me as well as other people here, and did so with the utmost patience, humility, and respect many many times. The guy was a plethora of camshaft knowledge. I guess it stands to reason since he designed both street and race cams for well over three if not four decades.
Anyway, as you may or may not know, lots of variables going on with camshaft operation. And ofcourse things like engine displacement alone can change how any one cam "acts" in one engine vs another. That's all I meant to say. Also, the valve overlap figure is just one variable in the amount of manifold vacuum it will cause. Because valve timing is more than just valve overlap. This really is a complex science.
The bottom line here is although some people might be able to give the OP a fair idea of what the cam in question might cause his engine to act like on the street, he should NOT be surprised if it turns out to be at least a little bit different than people told him it would be, once he fires up the engine. It was more of a heads up for him than an argument on my part. Peace.