Considering Holley sniper EFI for my 1969 340. Thoughts from people who have that set up?

After having done it, the only way I’d go would be a retrofit EFI fuel tank with an in-tank pump. The pump stays cool when submerged in fuel, it’s 10x as quiet and basically transfers little to no vibration through the chassis. Set it and forget it.

I get it though, this stuff is not cheap especially when you start adding up the plumbing pieces. These days an EFI ready replacement fuel tank and pump combo with all the trimmings will set you back a bunch but IMO it’s a worthwhile expense.

There are retrofit pump modules available now that install like the OE sending unit/pickup. That’s an easy and less expensive option though you wouldn’t have the benefit of having baffles inside the tank to keep the pickup submerged. Ultimately that could turn out to be a real PITA since you’d constantly have to be aware of how much fuel is in the tank to prevent uncovering the pick up.

This is the problem with all the ‘plug and play’ advertising. Will it work with minimal effort and investment? To a point, sure. Will it perform as well? Ehhh, not really. And when I say perform, I don’t necessarily mean peak power but rather the frustration vs. enjoyment quotient. It’s the same when you cut corners on anything.

Holley wants to sell products to everyone so they accommodate several levels of investment but the reality is that these systems work best when you use all the components they were designed around.