I have noticed a few black floaties underneath my radiator cap as well. Nothing major, I never noticed a problem in 2 years since I put my motor together.
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1988 Mustang GT
stock bottom 302, C4
10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN
1989 Mustang notchback
Warmed up 306 with a Procharger.
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