Quote: well to go with your theme, get rid of the msd box.
go with a points distrubter with a petronix setup instead.
not as much control, but less to fail.
I say keep the MSD but keep a stock box and wiring also there as a backup. When I used my Cuda as a daily driver I had the MSD and if somthing happened all I had to do was switch the wiring on the distributor from teh msd to the stock box and plug the stock box plug into the stock box and drive away. I know some people that keep spare ballast resistors and stock boxes as well in the glove box.
No matter what you make sure you have an upgraded voltage regulator in there.
As far as stock FI it's already been said spark, fuel and air is all thats needed and one of them will never change and thats air unless you want to use forced induction.
Of your combos the 318 will probably yield the best mpg but for a little less (not much at all) the 5.9 combo will give you a little more fun.
If you went stock Magnum with the PCM and all the FI setup I have been reading on the SCT tuners which work real good according to some members here to diagnose the issues and retune for best possible performance and economy.
