I think it is mechanical I'd have to double check. The second one you are seeing I believe is just a fuel pressure gauge that goes on the fuel rail. I could be wrong, I got those two gauges in a kit that I bought
Used out of my 9" rear end. Motive Gear F890411 9" Rear Ring and Pinion for Ford (4.11 Ratio)
- 8620 Steel Performance Differential Ring And Pinion
- Ratio: 4.11 Pinion Spline: 28
- Ring Diameter: 9 Pinion Diameter: 1.313
- Ring Gear Teeth: 41 Pinion Teeth: 10
Amazon.com: Motive Gear...
I have a 2005 with S&W's 9" rear end and I bought their anti roll bar kit located here:
https://swracecars.com/store/2005-2014-Mustang-Bolt-on-Anti-Roll-Bar-Kit-OSCARItem_238=40-708.aspx
The top mount plate welds to the floor pan. I'm somewhat new to drag racing and these types of setups...