I bought the wrong transmission for my 66.

jpl572103 said

I bought the car as is. 3rd gear grind. 4th gear howl. Seems to have gotten worse since the 8 3/4 swap.

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Those are easy to fix problems and cheap too.

What cannot be fixed in that trans is the wide 1-2 split. If that is NOT your complaint, then I would just fix it. If I lived next door, I could probably fix you up in a couple of hours, if the trans was on the floor and clean.