[SwiftDB4]

Ditto on the wideband A/Fmeter being so much better. AFX's system is about $250. Well worth it. The digital readout can be mounted for easy reading when driving, even on track days. Also if you have a Holley at least get metering blocks from Quick Fuel. That way you can at least change idle fuel jets. Better ditch the Holley for changeable air jets too.