Torque cam for 318 2bbl

Yes I have 2.73 gears by the way. Leaning towards
71-74 360 2bbl 410/412 252/256
75+ 360 2bbl 410/410 252/252
Meling RV cam 420/443 204/212 (@.050)

Not sure if 302 heads and 273 manifolds will want the extra exhaust lift duration
The manifolds would normally say 'yes' to that question.

May I ask why the preference for the stockish/rv cams versus the better, later cams? Sticking with stock valve springs or ???