Ed, I'd been planning to install any of several Chevy based engines in the old Excalibur, from a Mercruiser 4 cylinder to a 230 six, and a few different small block V8's, and hadn't even considered using the Cad engine. However, with a little adapting I can still run the same powertrain- - - -a 4L60 transmission and a Toyota Supra independent rear suspension with a frame-mounted differential, and put the engine Dad spent lots of time building and dyno testing to good use. He's been gone since 2014, just over a month shy of his 90th. birthday. The 4L60 has a Chevy bell housing, but mating the Caddy to it shouldn't be much of a chore.
Jerry