Never have run across 3.90's in a '70 1/2 T/A. Early magazines tests of a 70 1/2 RAIV T/A showed a 3.90 gear, & the car prob had that oddball 12 bolt ratio as it was a preproduction-engineering prepped car. 3.90's in a 70 1/2 T/A housing, would have to see the dated original GM gears & a buildsheet to believe it...
Colorwise, have ran across one green interior auto '71 T/A, one red interior-column shift auto '70 1/2, bunch of 70 1/2 sandlewood interior T/A's.
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Buzzards gotta eat... same as worms.
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