[Blackbirdws6]

You've stated the options but didn't mention your intentions with the car.

Based on our convos I would go 4L80E for the following reasons:

- sounds like it's overkill but I think that's a good thing.
- if you sold the converter you have, you would be close in price to the built 4L60E
- you would have OD
- taking a hammer to your car would be worth it for all the benefits
- I assume this would be a new unit rather than a used TH400 (told me never buy a used trans)