Call Pat Collins at TechWest Racing in NC. He repairs MSD products and is great to deal with. 704-995-4286
I'm not 100% sure (been a while), but I think I had the same thing happen to mine and everyone I asked said it was OK. I use the same 3 stage retard box w/ a 6AL and crank trigger.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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