Yep, I've got a #800-300 new in box and a #800-400 in use right now. From what I can tell the 300 and 400 boxes are the same, the 400 kit just comes with a crank trigger wheel and pick-up. The #800-400's crank trigger allows you to set the distributor's magnetic trigger up as a cam sync allowing you to use the ICT function(Individual Cylinder Timing). You can do anything imaginable with this ignition. I'm always on the lookout for another NOS set, both of mine have been under $200 scores.