Single or Dual Pattern Cam

Dan,
Wider LSA was the thinking for low rpm [ tq ] cams. Like many things, with more knowledge over time, things have changed....
Some examples:
- piston rings are now thinner
- when our boat anchors were built, the thinking was to place the spark plug near the int valve so that the plug was cooled by the incoming charge; it was then discovered that the hot area near the exh valve caused pre-ign, so modern heads have the plug closer to the exh valve to initiate the flame front in that area first.
- thinner engine oil with tighter clearances are used today on perf engines, compared with wider clearances & thicker oil of yesteryear.

Crower was probably the most advanced & innovative of the cam grinders back in the day & their Mileage-Plus & Baja Torque master cams were ground on 110 LSA, not 112-114 like other companies. These were mileage/tq cams & were SP.

If you want tq, use a SP cam. DP increases overlap which generally helps top end at the expense of bottom end.