How easy/hard to install Holley Sniper ?

[Racer57]

70 Cuda 383 750 Holley with shaker. manual tranny
I really want one. I'm good with nuts and bolts, but electrical stuff usually pisses me off trying to decipher charts.
From start to finish, how long it take to install ? Is there any modifications required ? Is complete ignition change out required?

[worthywads]

Can't tell you how long, I worked on it gradually, but I suppose you could do it over a weekend.

I used the in-tank retro sending unit, which takes dropping the tank.  Fuel Gauge accuracy sucks, it drops from full to half full in literally 20 miles, I posted up a detailed explanation of it more than a year ago.

I was able to hide the main control module under the dash, I see that reduced the size so even easier to tuck somewhere inside.

I was able to modify the factory 318 kickdown and throttle cable, but you are manual so no complication there.  I made a short link to get the cable an inch longer.

Overall not complicated electrically, but also plan on new spark plug wires, I had intermittent issues where it misfired like crazy until I replaced wires with MSD Ignition Super Conductor 8.5mm Wires.

I went with the Holley/MSD Superspark Distributor also, which is pretty cool for playing with timing.

[Skdmark]

I did the conversion in 2021 to a 318 with automatic. Took me about 3-4 days working at a very relaxed pace.
I had to swap my intake from a 2bbl to a 4bbl, modify the kickdown linkage and some extras for the wiring which added some time.

Besides the intake swap, I installed the following.
Sniper, holley in-tank fuel pump, Sniper canister coil, hyperspark distributor, MSD 8.5mm super conductor ignition wires, powermaster alternator, ammeter bypass wire, shock sensor for fuel pump and a ballast bypass harness.

I did not have to drill any holes in the sheetmetal of the car. I passed most of the wiring through a body plug that I punched a hole through.
The only hole I needed was to mount the O2 bung to the exhaust. Which was replaced last year with a welded bung.

Highly recommend going with Holley's distributor to control timing. I also used the hyperpark canister coil, but did not feel I needed their ignition box for a stockish 318.

Was a fun project and has worked well for me.
Starts right up, little to no warm up is needed and is responsive. The holley display screen has a lot of driver info to let you know how it's running.

https://forum.e-bodies.org/your-restoration-project-roseville-moparts/10/71-barracuda-ev2-h5xv/17032/45

[ignition1]

About 4 days of installation with all the parts and tools on hand. Electrical is simple plug and play within the harness, hot and ground to battery terminal, tach pin out, ignition hot.

More advanced pin outs & wiring if you are using an electrical fuel pump, electric fans, a/c. Then you will need to wire that in to other systems and possible relays. Maybe a day for this.

I think the hardest part is running the fuel lines, connecting the fittings, and mounting the lines. Running the wires through the car for the fuel pump. This is like 2 days for me to make it look clean and hide the wires.

If your budget allows I would definitely recommend the sniper fuel tank with internally regulated fuel pump, hyper spark distributor to control timing from the sniper computer, coil is nice but not needed (hyperspark coil needs a driver module mounted but pretty much plug & play), regular coil needs a small coil driver installed which is more cut and splice than the module.  About a day for this.

You can use your existing coil and distributor, which I did to save cost in the beginning. Then a couple years later upgraded the ignition side to hyperspark components.

I enjoyed the install, the responsiveness is night & day difference, and the confidence that the car will start each time has been worth any headache there was.

[RTSE4ME]

I just installed the Terminator X I gradually worked on it over the spring.
Easy to install the hard part is making the wiring look nice and tidy. I put the ecu where the radio was.
I used the retro- intank pump which was easy. I kept my old FBO ignition but did upgrade the ign module and coil to get rid of ballast. I didn't feel the Hyper-spark was worth the extra cash since the entire ign system needs to be changed.
Glad I did it.