Considering Fuel System Upgrades/Changes

Hard feed & return line would be my recommendation. That cam probably makes around 10-12”HG vacuum so it should be OK with a Sniper 2. A good, up to date, properly grounded electrical system is critical with any injection system as is the right fuel delivery, regulator and return. Having said all this there’s probably not a lot to gain in going EFI if your happy with your current combination.