@tpj71mach to be clear, there must be one way to ditch the pressure built up. That it's done by a pump assembly or by the regulator on the unit is the same. Indeed if you go for this kind of pumps, that saves 1 line to route. Back in 2017 there was only one Sniper kit, and no accessories.
While hurting your wallet a tad more. there are also details that are welcome.
- if you are handy with a laptop, you can buy a connector that will fit where the handheld is connected to.
very handy as you then can have your laptop on your seat and datalog realtime, vs run/log, stop. extract the card, insert in pc, pick the logs and repeat.
- the sniper comes with absolutely garbage rubber plugs to close the back ports.
buy a set of nylon high temp plugs and use them vs the cheapo ones that cracks ( left me almost stranded because of that tiny thingy and ruined my config, which I forgot to save...) I have after that seen that on my other unit, still in box for my 429 that the rubber is also degraded.
- Not necessary if you use a pump from holley that is ment to produce the 60 psi exactly. But if you use a third party one, that is with no doubts as good, having a fuel pressure gauge that you can hook at the inlet on the unit is handy, especially if you have issues that could be pressure related.
- make sure you download from their site the latest firmware. Some units were shipped with missing files and some with older firmware.
- register on the holley forum now, as sometimes it takes ages before they allow you to ask something.
For first try, make sure the blades are open a tad, say, turn the screw 1/4 extra from the moment you see the blades opening. As even if you have not set the IAC, TPS or something else not 100% ok, this will give you the chance to start without issues and let it warm up at a may be higher idle than you want, but you won't get issues.
You won't be the first to be overwhelmed when it comes to the first stressy moments.!
As you need also to check for leaks, see if nothing on the handheld goes thru the roof. If slightly open, even if IAC is at 0, you are sure it will start right away.