Mystery solid lift cam valve lash help

I dunno man.....if it was me, and I know this probably isn't what you want to hear but since the thing came to you in a somewhat bastardized condition I'd wanna get to the cam itself and try to get some numbers off it for a positive I.D...
There's a possibility the last guy had some valvetrain noise he didn't like, and saw on the internet and TV how guys are putting solid lifters on a hydraulic cam. The problem is, when you do that you can't really have any lash there because the hydraulic lobes don't have the clearance ramps like the solid.
In other words if you go on the assumption that it really is a solid cam, and it's not, and you set the lash at .020" or whatever you'll destroy parts and that's no good...but like i said that's just me; I tend to get a little paranoid with things that someone else built.
If there was any way you could confirm things with the former owner, that might save you some hassle.