Tall is for the injector.
360 port is tall by most standards.
Afaik..The LS head typically does 220s-240's stock. A mildly worked x head or j will do that. An ootb sm head is about as good, under peak is 10cfm behind ..but peaks as good or better.
Build an equivalent small mopar to an ls. Same cam, compression, cubic inches etc. The mopar with the x head or speedmaster will be 50 hp less. The flowbench doesnt tell the whole story.