93 Cobra lower air intake manifold questions
 

New to the forum. I am in the process of building a 49 Ford and putting in a 302 crate motor with a 93 Cobra air intake manifold. Pretty basic question. On the attached pic, I am looking to confirm what the 5 listed ports are for. I believe #1 is the temp sending unit and #2 is the ACT sensor. #5 believe goes to the heater core and will have the ECT sensor tapped into that line. Can someone please confirm this and let me know what #3 and #4 are for?
Thanks

Re: 93 Cobra lower air intake manifold questions
 

block 4 and 3 off.

Re: 93 Cobra lower air intake manifold questions
 

Thanks. I've come to find out they are cross over ports for additional cooling for racing applications and that drivers or strip cars can just blank them off.