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Hey Folks,

I installed a Sniper Stealth on my ‘68 a little over a week ago. After a long bit of contemplation I figured the Stealth setup was worth the extra $100.00 to me just to keep the carburetor look. And I decided to buy their kit which included the external fuel pump and regulator Rather than going with a new tank and in-tank pump.

If any of you do this, spend the $35.00 on the Aeromotive fuel pump isolation mounts. I ran mine for a week with just the rubber-coated straps that Holley supplies to mount the pump with. While this pump is not obnoxious like the regular Holley red and blue units, you can hear it. Priming is very loud. I couldn’t hear it while driving, but could hear it when at a stop. Today I added the isolation mounts and I’d say it cut the sound down to about 25% of what it was without the isolators. You can now barely hear the pump when it primes and can’t hear it at all with the engine running. Just be ready to drill the straps to accommodate the 1/4” studs on the isolation mounts. The original holes accept a #10 screw.

Also, just buy the Holley throttle lever extender when you buy the system. It’s about $23.00, which is about $20.00 more than what it’s worth when you see that it’s just a straight, flat piece of steel with a dogleg and a couple of holes drilled in it. But moving the throttle actuation that little bit farther from the throttle shaft makes a huge difference in feel at your right foot. Without it, my throttle was very abrupt. It would all but stick closed until you gave it just enough pedal pressure to spring it open for a nice little burnout. Without the additional lever I tried running mine with no return spring, and with one, then two return springs. Nothing would smooth it out. Now it’s as smooth as glass and adding return springs just increases pedal pressure slightly without causing any bind or hesitation.

The aftermarket “Chevelle drop-base” air cleaner I was running on my Street Avengers fits the Stealth throttle body just the same. That is, I have to run a 1/2” spacer between the throttle body and the base of the air cleaner just like I did on the carburetors. Also, with the throttle extension installed the throttle crank still clears the air cleaner base. Essentially, the clearances on the Stealth throttle body mimic that of a standard Holley carburetor.

If you have a nice braided inlet hose setup for a dual-feed Holley, it may or may not just screw right onto your new throttle body. My inlets on the Stealth are spaced about 1/2” farther apart than they are on the Street Avengers. ALSO, most Holley inlet extensions use a female AN fitting. The Sniper uses a male inlet fitting. And on that subject, the inlet fittings that Holley installs are too short. When you tighten up the supplied fuel feed lines the fuel hose is pulled very tightly against the throttle position sensor plug. Horrible design. I used a pair of -6AN male to -6AN female adapters which were plenty long enough to give the fuel inlet hose enough clearance.

AND... on the subject of fuel hose, you’ll need about 10‘ to 15’ more than what Holley gives you in their kit unless your car is an SS and you can use the factory 3/8” hard line. Mine is, but even still I used every inch of the 25’ that they supply. If your car has 5/16” fuel lines plan on spending money on more feed/return hose or hard lines.

Regarding the plumbing, for some reason Holley supplies one-too-few barbed hose fittings. I needed one more -6AN female to 3/8” hose barb fittings than Holley includes. As it turned out, I added a 2” pigtail to the tank end of my return line so that I could disconnect the return if I had to drop the tank in the future. Otherwise I’d have to fight with the fitting while trying to balance the tank in place. So instead of being short just one fitting, I ended up using two additional hose ends and one each of -6 male and female fittings. Also, had I not done that I would have come up 2‘ short on fuel hose.

That’s all I can think of for now. I’m very happy with the system. I just wish I had been prepared to buy these few little add-on‘s when I first got the system. It would have saved me some time. Hopefully this long winded post saves someone else a bit of time when planning out their system.
 
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