Holley Blue install will be this weekend, and wiring is not exactly my thing. I have been doing some research and it looks like I will need a 30 amp relay. So is this what it should look like?

30 is the positive of the battery (on a 20 amp fuse)
87 is the positive to the pump
87a is the ground
85 is connected to the ground of the triggering voltage.
86 is connected to the positive 12V of the triggering voltage.

Also, what should I use for the triggering voltage? Is it best to use the stock LP wires?

 

Looks right, but I'm going off memory so take it with a grain of salt. Using the lift pump wire as a trigger for the relay is just fine to do. Works great.

 

anybody else?

 

Same as above, i trigger my Holley relay off the stock LP hot.