Could you order a stick on the 3rd Gen Caprice? Those came out in 77. I'd think other large cars from Cadillac / Lincoln were never offered with a stick.
According to Wikipedia from '58 on the Continental only had an automatic. And the Cadillac Series 62 from '54 only had an automatic.
Right now we own 2 cars with
no transmission
(just a single reduction gear)
-J