That depends on which model of MSD distributor you have. The 8360 does not require a box to run whereas the 8361 does. Both of those have a vacuum advance which you want on a street driven vehicle.
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Originally Posted by BIG KRIS
Wondering should i change out my hei distributer for the msd pro billet now that i have purchased the 6al? I have been told leave the hei no need to go to the msd.what do you fast guys say.
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