Air Gap vs. M1 Single Plane For Stroker

I don't think you'll see any noticeable difference one will be a little stronger down low a little maybe, and one will have a small advantage on top equals personal preference. Both are very good manifolds and due to the strong torque of a 4 16 you're not going to lose anything on the bottom end to an air gap. the heads will limit top end so you're not going to really gain anything with an m1. You choose.