Well- Might get lynched for this but-
When I stripped the Lean Burn system off my 82 New Yorker I replaced the ignition module by converting to a GM aftermarket HEI module.
Cheap as death (modules are $15-30), available literally EVERYWHERE, and give a good and hot spark. Car starts easier, runs better and gives me better milage.
Read about it here first:
http://www.dippy.org/forum2/index.php?topic=2849.msg33339#msg33339
and here:
http://www.slantsix.org/forum/viewtopic.php?t=15779

If I could afford it, I'd probably run an MSD-6 unit for the same reasons, but I'm dirt-poor, so this is what I did.

Good Luck with it,
CC.