Slant 6 to small block trans bell housing adapter

I guess they made these in the 60s to mate 727s to /6s before they made a trans case that would directly bolt to a /6. I guess A100 series vans and taxi cabs were most likely to have been equipped with them.
I just had an A500 fall into my lap I wasn't expecting.
What have you got collecting dust under your workbench?