Dumb bell solid lifters

the aftermarket cams also spec a longer pushrod as every one I've seen sold for the mechanical valvetrain is longer than the stocker. Makes sense as they all have a lower base circle. I have heard the myth that the dumb-bell lifters will window the oil galley too on a high lift cam. Im thinking the 273/2 cam had a lobe lift of .405 (ex) so the lifter bore is going to be .499 above the base circle: (.270+.229 rust band)~ .405/1.5=.270 lift at cam. So theoretically the max lift (drop) of a dumb-bell lifter ON A 273/2 BASE CIRCLE is .290 or .435 valve lift which is shorter than every factory 4bbl cam ('cept the 273/4), all hydraulic.. Maybe no myth? I dont know the base circle of a 273/2 cam though, is it really 1.34? so we can do some more math.....LA cam bearing Id is about 1.956 (smallest one lobe has to go through, #4). so any lift you have is going to drop the base that much / 1.5 (rocker ratio). Lunati at a 1.19 base circle has a max lobe lift of .383 or a .574 lift.