just put a msd coil on my stock 95 5.0. only reason i went with it is because i had to have a new coil anyway. my stocker was physically wore out ( coil wire wouldnt stay on ). a stock replacement is $16 but since i eventually will do a ignition upgrade, i went ahead and got it.
as far as a noticable difference....well, the car runs crisper and smoother but that is because i replaced the plugs (platinum), wires ( fms 9mm ), distributor cap / rotor ( msd ) and fuel filter all at the same time with the coil.
that coil on a stock ignition is ok, right? not 'too much' coil ( if thats possible )?