...
....I'd suggest that if you're looking at a car 1982 or younger look for the stopping tabs on the engine crossmember, and look for an "A" on the box (which means it has an internal stop. If you buy the box from me (or have yours rebuilt) I'll talk with you to make sure you get the right one.
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Can you post a picture of the location of this "A"?
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1983 123.133 California
- GreaseCar Veg System