Wich port or ports in the middle carry water on BB cast iron holley manifold. Just want to know where to put sealer for water. There is a square and two slotted ports in the middle.
Tom

There are no water ports in the middle of the intake.That is the exhaust crossover.

All three are exhaust crossovers?

The big one is the exhaust crossover. The smaller two around it are hollows in the casting to reduce heat transfer.

The center square one is the exhaust passage. Im not sure but I dont think the 2 slotted ones go anywhere. Stick a light in there and look.

Did the light thing already couldn't see @#$%.