I have a 670 H.O. to put in my Formula Z 670 and everything is matching up except there is a vacumm fitting on each side of the rotary valve casing and I'm not sure what they go to. I don't have this on my current motor and was wondering if anyone can tell me if they know what these are for. The sled this motor came off of had a DPM system on it. Also wondering if these are suction or pressure lines.

Thanks:mellow: