Is this a real L78????

[JoeG]

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We're running the stock 4.10s in our Chevelles and you wouldn't want any more than that for running down the highways. 3200 at 60 mph. 3800 wouldn't be any fun at all.

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Yeah I know---I was goin 50mph at 3000 rpm on tall tires-----wasn't too much fun on the highway--but the 4.56 rear was killer...
Sully...my car was ordered with the 4:56 rear, but on the buildsheet it had 4:10---4:56 was listed on the dealer invoice---maybe because my car was going to be worked on anyway, the dealer figured he'd get paid for the work...