If you want a runner and can afford the RE RE trans then that's the way to go and just keep the original trans to keep its value in future.
And one picture is not acceptable , we need many more pictures
I agree with Dadio. Also, rere Ultima and rere Optima share transmission parts including the slipper assembly. I should also note that due to updates Kyosho made to the rere, it's extremely difficult to fit rere transmission parts in a vintage Optima (different FDR, gear pitch, etc). And this even i...
It's been a long while since I've had my car apart so I really don't recall many of the details. For the front diff, if you run the chain, then you can continue to run the car's original front diff assembly - the specs for the chain is the same. If you switch to belt drive however, the front diff as...