The Edelbrock Slingshot is equipped with two vacuum ports, one for the distributor advance and one for the wipers. It’s pricier than the two you’ve listed, but it’s well worth it. Also, it should fit your ‘37 block as it works great on my ‘36 21 stud. I did have it polished before being installed.
https://www.speedwaymotors.com/Edelb...CABEgKj1_D_BwE