for Ign. I like to by pass the stock harness and run a points dist with a pertronix points conversion. that will drop in the magnum block.

and make sure to use the magnum N balance flywheel. I scored mine at advance auto for 135$ IIRC the 5.9 was 165$

for headers I would go with the hedman 79170 which work on a 92-93 D or W series chassis with magnum/NV4500 5 speed. FYI** new style pilot bearing.