The water is mechanical, you can see the tubing next to it. You'll need flex tubing to connect the boost gauge. Just Y it into one of the vac lines under hood. Autometer part 3223 has nylon tube and a connector nut to attach for $10. I might have the nut though, looking for it.
I also have a pair of Centerline Convo Pro rims like new, 15x8.5" with 5" BS (frame notch required or spacer). A pair of barely used 28x10.5 stiff sidewall MT slicks are mounted. If anyone is interested, let me know.
Might fit in a large flat rate box....like $15. I'm sure someone I know will be going to the open house if you just want to do paypal. I do have someone asking about it with the amp on the other board though, FYI.