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Old 11-06-2006, 10:05 PM   #26
HOTFUN
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Re: Original Big Block Truck?

If the rear end is 3:54 gears and it looks like the original DANA 60 it was only installed behind the 402 turbo 400 in 1971 and 1972 for sure. At least the last 15 or so big block C20's I have owned or parted all came with 3:54s behind that engine. And all have had a bolt in high hump floor in the 71 and 72's. Now the 68-70 years I have seen turbo 400's under low hump floors too.
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Old 11-06-2006, 11:59 PM   #27
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Re: Original Big Block Truck?

3.54 was the standard rear ratio in BB C20's ..but you could get an optional gear ratio...such as 4.10.
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