Engines with lack bottom end power?

Engines (good engines) make more power with less torque after peak torque.

Horsepower is real. It’s what makes cars go quicker and faster.
Did you have any thoughts on why? I figured you'd be able to.

It's always been described as lack of low end torque/power but as I've start to notice most mild to fairly wild engines have good low end numbers, single plain intakes bigger cams etc.. generally trade low for top end but even then these engine still make pretty good low end number generally better most stock A body engines, so my guess it ain't a lack of tq/hp down low but something like overlap or some other cam spec? That makes some of these engine feel like a dog down low.