Not directly, OP asked about 300 hp /6, 273 or wherever, you said 360 or stay /6, so if the OP says no to 360 that only leaves 300 hp /6 over a 273 in your stated options
I don't see a /6 having more torque potential than a 273. Torque is Cid which 273 automatically wins and VE% and efficiency don't see a /6 having a clear advantage of even one especially both of those.
Op is asking about modified, 300 hp.