66 Cuda slant 6 for 289 Ford Possible???

For all the effort to install a 289 v8 and trans, driveshaft mods, exhaust, etc. I would rebuild the slant or get a good running engine and swap it.

I did the reverse in high school. 67 ford f150 short bed with a blown motor. I made some motor mounts, dropped in a 225 /6 and trans. floor auto shift, Stock Mopar drive shaft bolted up to the diff and I used the ford wiring. It ran great!