My 383 is loving this!

I just installed this unit on my friends 73 challenger with 340 stroker. All in all its fairly easy. We had issues finding the right power supply wire to use. Switched and on while cranking. He has the msd ready to run distributor, a one wire alt, msd coil, so none of the original ignition components are used. Since his underhood harness is new we did not want to cut any of it. we eventually got that figured out. In most cases I think a return fuel line is going to be your best option. Msd has a questionnaire about your driving habits and fuel system set up to determine if you need a return system. My opinion is that the majority of people will need it. If you decide to install this and use a mallory 4305M regulator, be aware that it comes with 3/4-16, -8, o ring fittings. We used -6 black thru out so we had to buy those fittings. The atomic comes with black AN fitting on it along with a straight and 90 deg push lock fitting.

So far tuning is simple. We have a comp extreme energy cam that is right at the threshhold of mild to large based on duration. We went with the large option.

I will post some pics soon.