Action Plus, 360, or...?

I picked up a SP2P from a member here and those ports are restrictive and small. An old co-worker of mine said they were introduced with the idea to help save fuel during the 1st gas crunch. I believe.

I agree with everyone here. The Weiand is the choice to make here. The difference between the Weiand and the Edelbrock LD340 is moot. The dual plane is what your after.

IMO, skip the port matching. Just run it, your good to go.