Stock Rocker Ratios

Hey all,

I am led to believe that the Stock steel stamped rockers were generally not quite up to their Factory rocker ratio rating of 1.5:1 however are the ductile iron adjustable rockers as those found on the solid cammed 273 small blocks any more accurate.

I'm just not keen on throwing in a new cam knowing that I'm not really getting the intended valve lift. Has anyone attempted to accurately measure the ratio on the 273 rockers?
I'm guessing that they also could vary substantially?

Roller Rockers for Mopars are expensive? Any other new Rocker alternatives I should know about?

Cheers,
Teedog.