Mine was so nasty and broken on the 67, I took the whole thing apart and bead blasted it. I was able to repair it much easier this way. I had no idea how many parts there are to this system and how many gaskets you need to put it all back.
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Wally
Gold #67
67 Malibu "Small Block"
90 SS454
71 Malibu "Small Block"
93 torch red vette