More cam questions

I have been planning this build for a street 1971 Demon with a few passes down the 1/4 about once a month for fun.

360 + .030
stock crank and rods
KB 107 pistons, zero deck
71 360 j heads 2.02 in 1.6 ex, gasket matched
eddy air gap intake
750 DP
3.91 rear end

question is this:

I've input many many different cams into desktop dyno with some surprising results. Originally, I was planning on using Comp Cams XE274H but desktop dyno seems to say that a milder cam would work better such as their Magnum Muscle 268AH-10 cam. DD gives this cam more than 410 torque from 2500 to 5500 and tops it out at 451hp at 6500. it only give the xe274 433toque at 4500 and 440 hp at 6500.

I'd like this to be a 12.5 second range car.

At what duration does idle lope come in? I really don't care, just curious.

Anyway, I know Desktop Dyno doesn't translate to real world results so what have you guys seen in the real world? If you could help me limit the cam selection I would greatly appreciate it.

Mostly street driven with 1/4 mile passes once in a while for fun. I'd like the lopey sound too and I'd like to idle around 750-850.

Thanks all.

-Alex