cam specs......i think i'm disappointed

well, i took the valve cover off and connected my dial indicator, hoping to confirm what I was told when i bought the car....that it has a .509 lift cam

much to my disappointment, i found that it has .400 lift at the valve.....and although i know it's supposed to be tappet [email protected], i measured it at .050 VALVE lift....got *about* 216.....i know the cam duration will be slightly lower......BUMMER

the thing i don't understand is that it has a nice lope to it. seems odd to me
so what i have deduced from this is that someone seems to have taken a stock 72 400, added 452 heads, a torker 383 intake, windage tray, Mallory ignition and dizzy, Mopar aluminum valve covers, a new holley, and some other stuff.......

or MAYBE i'm doing something wrong...i measured it at the top of the valve retainer....

anyhow....gotta figure out my CR somehow so i don't go too overboard with a cam