Sizing carburetor

There is nothing wrong with the cam card. For some reason Schneider has elected to use 0.020" as the lifter checking height [ not the more common 050 ]. Perfectly ok with a hyd lobe as the clearance ramps are short...& at 020 well past them for an accurate reading with a degree wheel.
This is from the cam card:
- 220/210 @ 050
- 250/236 @ 020.

Some will never get it about exh duration......
Comp Cam 12-402-4. 212/218 @ 050. Blower cam
Comp Cam 12-400-4 218/212 @ 050. Turbo cam
Crower Cam 00979. 226/208 @ 050. Turbo cam 6500 rpm +.
Since turbo & blown engines have MORE exh gas to expel, Crower reckons 208 @ 050 is enough duration to 6000 rpm with a 6500 redline. Hmm.