Bryan is right.

And piping is much tougher to weld when first getting started.

If I had the project on my table...

I would;

Use the cherry picker to position the motor in the engine bay where I would need to install the mounts. Considering how the motor torques and use of heavy duty hardware. The longitudinal setup means you'll have to use the roll stops on a customized cross member. Again considering clearance issues with things like exhaust, charge piping, accessories. While the upper motor timing side mount would likely need the rad support.

In fact, the more I think about it.. The harder it is for me to gauge how much work is needed without physically seeing the engine bay and how the transmission is factored in.

The last guy on this board who did what you're about to do, did it successfully in a 1964 valiant. He did post the project on here. Guys name is Dan Falardeau from HP racing.

That may help you with getting some ideas on what to expect.

The intake manifold is another one.

Hell of a daunting task