1973 225 valve adjustment help!please!

so if a rocker is adjusted to tight on the valve , even by a few thousanths , it will run rough on that cylinder? and i will try the broomstick method to see if it is the fuel pump knocking or if it is fact a rod knocking.i just started hearing it today after i shut the ticking off and it only reared its ugly head after it warmed up. its sounds like you guys are getting good results with the engine running. i may give that a shot too as i still have a valve or two ticking that im sure wasnt adjusted correctly, of course it may be a worn rocker arm but we shall see. even though you guys dont all agree on methods i truly appreciate all the input....