318 Poly in an Early A Body?

It occurs to me that, with the money you're talking to install an antique boat anchor of a motor, you could spend a couple grand on a well built SIX CYLINDER and have a kick *** ride that would eat most v8s! The 340 (or better 360 magnum) would be scary fast. And it would probably be easier to install the Hellcat HEMI for not a lot more than you would spend on obsolete poly parts. It all takes me back to the old saying "If you WORK at it, you could probably put a saddle on a COW! It would take some engineering and then you might even be able to RIDE it! It's just NOT THE RIGHT THING TO DO!