Some questions. Why the DUI?. What is it you gain other than it is new. Back when GM used HEI, they were quite unreliable.
I've got my 60 just waiting for me to resurrect the old girl. Can you tell me why a Sniper and not a 2FE? I would think the 2FE solution would be a better setup. But then again, I am no expert.
Has anyone dynoed a Sniper setup?
The DUIs seem pretty reliable. They are definitely a better build quality than the cheaper generic HEI units. The factory distributors are nice and high quality, but getting harder to find.
The Sniper & 2FE are apples/oranges.
The Sniper is basically an electronic carburetor, and only requires four wire connections. It bolts on the factory intake.
The 2FE requires swapping the entire head, intake, and exhaust from a 3FE, and a lot of wiring. The 3FE is a smaller displacement motor with a smaller combustion chamber, so you’ll end up with around a 9.5:1 compression ratio, which is why they are so powerful.
The direct injection of the 3FE is a superior form of fuel injection, but it is about 10x the work and likely more expensive, even if your time is free.
For less work and a simpler system, you could just pull the 2F head, mill it for higher compression, and bolt it back on with the Sniper and end up at about the same place.