I would go with rubber, everything poly I have ever had tends to dry rot, and become very brittle. My 72' still has original body bushings, and they look amazing. However, I do have a 49K original mile car.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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