Originally Posted by hemi joe
ok than what is that rear passage for.i don't understand,i need to be educated.
The rear passage in the head is there so it can be used on either side of the engine- both sides use the exact same casting.
There is no passage in the rear of the intake, as I mentioned before. The front passage is what is used. The gasket is similar to the heads- one gasket (like one head) will fit EITHER side of the engine.