The MSD 6a is compatible with near any engine mustang came with, although im not 100%sure about the 4.6's. As for the MSD 6AL, because of the rev limiter it comes with it requires you to cut 1 or 2 wires for v6's and 4cyl cars respectively. for the V8 you leave all the wire intact. If you previously cut the wires for a 4 cyl or v6 all you have to do is tie the wires back together. Just in case you didnt know you will probably need to get a tach adapter or a new tach if you dont allready have one.
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1982 Red GT
Performer RPM Heads, Performer RPM air gap intake, Performer 600cfm carb
holley blue pump, DF clutch, 8.8"w/3.08 posi, and many more.
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