My old 96 SS had a 4l60E from a 93-94 Astrovan. The bellhousing flange area is slightly different as the Astrovan trans had some extra material the F-body didn't need. I think you should be able to bolt it up. The only difference might be the lower inspection plate might not fit but you can find them used if you still want one.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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