I knew you'd know all about them, Bill. They sure cut down on the wear on the points.
However, in a way they pulled too little current through the points since the points wouldn't clean up when fouled. You probably remember my story about running out of gas in one tank on the 390 and switching over to the other. But the engine wouldn't catch.
Long story short, the high vacuum during the coasting time had allowed/pushed oil vapor into the distributor and fouled the points. I ran a business card through them and it fired right up, but that was after I disassembled the QJet on the side of the road, convinced it was a fuel problem. After all, I'd run out of gas, so...
Gary, AKA "Gary fellow":
Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI