[JLMounce]

In general, these systems can often support a cam that will produce around 6" of vacuum and higher without a lot of tweaking. A cam large enough to pull that little vacuum will likely still require some trial and error idle and off-idle tuning, but shouldn't be too much of a headache for either the Sniper or FiTech systems.

If the engine produces less vacuum than that, the systems can still function, but getting them to work properly requires a lot of manual tuning, outside of what is easily achieved through the handhelds. If you're getting into that large of a cam, you would really be better served with a different offering. If it has to be a TBI system, I'd look at the holley terminator. Tuning is more involved but that system has more capability.