440 intake manifold decision

I have one but its still too high for the RPM after adding the adapter plate for the spreadbore carb..
I understand, I wanted to ad a 1/2" spacer but can't because of room. I have about 1/4" of space under hood. If not for the torque strap I would probably hit on acceleration. I guess I could see if there's one with a lower drop. Good luck with your decision. Hope you find something that works well.