So here's my situation: I removed my VP44 today. The previous owner of my truck has glowshift gauges installed and the fuel pressure gauge is shot. While my truck is down, I'm tearing out any wires and connections this guy installed for the gauges. He has the top of the exhaust manifold drilled out for EGT's, which is good so hopefully I can use this for my Edge EGT tap. He had the VP tapped into with the fuel pressure sending unit which is now off completely. Here's where I'm a little confused. He has the third bolt of the injector lines hold down bracket tapped into with some kind of tube that runs to the back of the gauge pod. What is this for? Should I replace it with a 10mm bolt like the rest or plug it up somehow? Will it be useful for an Edge install? I know this might be a little confusing and I will snap some pictures tomorrow, but I need some help figuring out how to get rid of this mess. I'm installing an Edge w/ attitude soon and want to get this sorted out first. But I may decide to buy it sooner than later for monitoring of the new pumps.

That bolt is a boost bolt for the boost gauge... But there is better ways of doing that like using the pipe plug over by the MAP sensor (3/4")

Ok, so I think I will plug that up then. When I get the Edge, I'm assuming that would be eliminated anyways right? I'm sure the Edge comes with better ways to hook things up than this guy...

Edge Juice will most likely just read from the MAP sensor...

Cool. Would you recommend a needle valve for the Edge or does it have some kind of resistance to spikes unlike the analog gauges?

senders for electronic gauges are not immune to water hammer either. Use a needle valve.