I doubt it is the cam choice, should have tons of torque. If the cam was installed correctly, and none of the lobes are wiped out, then I would look at ignition timing, and fuel system. May need a large accelerator pump shot on that 6-pack?

This is my cam card for my 512 b motor stroker. I set the initial at 19 degrees and backed the mechanical to 36ish after reading a bunch of threads on here. Also dialed the vacuum advance back a bunch of turns to eliminate pinging. It's a bear off the line, smoke and sideways etc.

Custom spec from Mike @ Muscle Motors.

496 with 9.2-1(no quench),ported iron heads,ported ch4b intake,Holley 750 hp,TTi 1 7/8 headers,3" to x pipe/2.5 back,11" converter,3.55 gears,16-18* initial 35* total in a 4400+lb c body and has run a best of 12.54 @ 107 with drag radials.

HUG HTL3742BS

Camshaft Technical Details
Intake Valve Lift 1.5
Exhaust Valve Lift 1.5 .534"
.543"

Intake Valve Lift 1.6
Exhaust Valve Lift 1.6 .569"
.579"

Intake Duration at .050"
Exhaust Duration at .050" 237°
242°

Lobe Separation Angle 109

Intake Opening at .050"
Exhaust Opening at .050" 12.5° BTC
53° BBC

Intake Closing at .050"
Exhaust Closing at .050" 44.5° ABC
9° ATC

In my 440/496 I am running a comp hyd roller. It was custom ground for my engine from part #23-000-9.
gross lift at intake .589/exhaust .595
duration at .050 .242/.248

Ported Eddy heads, 9.7 comp, Holley SD, 4 speed, 3.54 rear, 1 7/8 headers with 3 inch exhaust, MSD pro billet distributer, Proform 850DP, total timing 34 degrees
Car runs extremely well and will melt tires at will