Engines with lack bottom end power?

if it's a amount of Torque issue how much low end torque from 1500-3000 rpm do you need before you have soft lazy dog etc.. car ?

A stock 2BBL 360 dyno's about 325rq @ 2000 & 2500 rpm 340tq @ 3000 rpm
A stock 2bbl 318 dyno's about 287tq from 2000 to 3000 rpm
obviously 170-273 would make less, probably 150-250 tq.

So a well built 318 should be able to at least do 2bbi 360 low end torque numbers
a well built 360 seem to be 375-400 tq @ 2500-3000 rpm.

What would be the torque line from 1500-3000 rpm?

and does that mean you can't build a strong running /6-273 ?
Which we know there are strong running small displacement engines.

And if there's a torque amount line you could surpassed it by building a large enough displacement engine which we know helps but there's also built big block that are weak down low even though there making more torque than most small blocks.