Small port heads, big port intake. How bad?

Cudafever said
M1 is a single plain right?

M1's came in two flavors, single plane (like on the 380hp crate motors) and dual plane (like on the 300hp crate motors). The one on this car is a dual plane.

Pretty sure this is the same one - http://www.summitracing.com/parts/DCC-5249572/