I know you asked about fuel but RFI/EMI is a real issue for many with the Sniper so attention to wiring is key. Keep the pink ECU trigger wire isolated. Some use a relay for this wire to avoid RFI/EMI issues. Use heavy ground cables - don't rely on ground straps. Us resistor spark plugs and for plug wires, many have had luck with the MSD Super Conductor sets. If you have a FB account you should look at the Holley Sniper Owner's and Tech group: https://www.facebook.com/groups/100847380485430
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Will Rivera
'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears
'69 LeMans Vert, 350, #47 heads: Non-running project
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