Msd

Rengo said

My 75 Ply. Duster.
I have talked to you about it recently on the exhaust manifolds. I have that figured out, have the intake, carb idea.

225 w/ 904 auto and crap for a rear end.

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ok your car already has electronic ignition. some people do not like the factory boxes and some do, they work when they work. if you want to convert to an HEI controller contact TrailBeast.

the MSD box is gonna be money down the drain, better off doing the below.

upgrade to a Petronix 3 Ohm E Coil
http://www.summitracing.com/parts/pnx-60130/overview/
install NGK ZFR5N 3459 plugs without the washer, gapped to .045
ebay 8.5mm wires
http://www.ebay.com/itm/261045845276?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
Standard Bluestreak cap with brass contacts (CH-410)
new rotor with brass contact

your going to need to do a ballast bypass for the coil (or run a new heavier wire) and use a relay inline to the coil for a full 12v.