There was a gear set made in Italy for muncies with a .85 4th gear.Only rub was a 2.20 first avail in it.I had one in my 69 bird with a 366 RAV short deck engine.Was very good in it with a 3.90 in the back.Dont think it would be great in a GTO weight car unless it had some cubes like a 455.Tom
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