RE: Re: RE: TFI upgrade, What is it?
DUI is an aftermarket HEI system made for the AMC, and several other makes. Where a factory HEI system puts out a good 40,000 volts and might be stable to 5,000 rpm, the DUI comes with a 50,000 volt coil and a high performance module. No other components are required. I think they run a little over $300. It's my personal choice for the I6.
You could go with a billet dist. and ignition box from MSD, and have a better quality setup from some perspectives.....but it's more expensive, more complex, and not really needed in this application.