NV4500 swap.

Do you know how difficult those are to find? Good LUCK!
Amen- I've been trying for a couple of years to find one to swap into my '66 Sweptline. And when I do find one, it's ridiculous $$. Considering a Getrag instead; people seem to be swapping them out for the NVs, so they're considerably cheaper. But, there's a reason that they're swapping them out... :(