I don't like the newer MP distributor kits,they use what looks like a Mallory dist.Nothing against Mallory,but I like being able to get stuff from a local auto parts store if need be.What I'd do is get rid of the lean burn,and wire in the Mopar system using either a ignition harness from MP(or cut one from a junker) use a reman distributor and a auto parts ignition box.You can always put in the advance springs that MP sells and virtually have the same deal they sold years ago.
The instructions for the lean burn conversion are in the old MP "bibles",But if you need the info I can send it to you.It might be avalable at
www.moparaction.com in the tech section too.