i have a 1992 mazda navajo in search of going fast and getting better gas mileage has anyone put a msd 6al ignition on a 4.0 yet and if so where to start im shooting to atleast be able to run 13.00s all motor i alredy have a cam ported and polished intake manifold good plugs wires and ac delete with shorter belt no for the power old one shot so just took it off two down at sixty works pretty good what intake kits provide the most power i can make my own but am i really going to notice that much of a horse power gain im able to bury my speedo in third past like 90ty and still got fourth when i go to forth im only at 3800 and i shift at 5000 lol and keeps pulling ive been side by side with a 2010 civic si with intake and they are 197 horse motors stock not bad on my part i think out of a 155 horse motor