1977 Square Body GMC C3500 Dually L92/4L80E Swap

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07-06-2016, 02:45 PM

#21

1936 LS1

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Sorry to resurrect such an old thread but how did this swap turn out? I'm looking at doing a similar swap in the exact same type of truck (but with a 454)
Glad you did it?
Fuel mileage?

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