Trick Flow small block heads

I’m not sold on the low gear sets and here’s why. Take my sons stock crank 360 with a .620 roller cam, ported open chamber (340 style)heads 3200 pounds, in to hole flat top pistons, 727 and a 5600 stall converter, and 4.10 gears. I don’t even think s low gearset is available for a 727. Here’s a time slip from Norwalk