Yes I did. I think reading at the bowl can be deceiving. Since it's in front of the 8 drains (injectors). If you read past all 8 injectors (in a line that connects the heads) then you'll know the lowest pressure of the system. I feel like it's more accurate that way myself.

These heads are interchangable from left to right. So as they sit stock, the fuel lines are bolted to the front of the head, and fuel runs through the entire head in a "rail". In the back of the head is the same port that's in the front, it just has a plug in it, exactly like the plugs on the fuel filter bowl. You could remove the plugs from the back, put a cross-over line connecting the two heads in the back and put a "T" in somewhere and read from that. That'd be the most cost effective way of getting the best pressure readings and equalizing pressure in the heads all at the same time.