The 7AL would be my choice, even have one for sale LOL, dont need it anymore. They will fire a cylinder full of oil, can cut the electrode off of the spark plugs (for clearance) and they will ground out on the pistons.
.......Thanks guys..............i have never played with MSD other then 20 or so years ago with a 4?.........just the module.............now i may need other things 4 the system.......i have an E coil and a Mopar Performance billet dist............kim.........