How to store engine?

I'd put some oil down the cylinders at a minimum (assuming you are storing in a garage). I got a furniture dolly from Harbor Freight (like 8$) and screwed a couple pieces of 2x4 on it so the engine will sit on it. Put a big garbage bag over it or clean all the ports (ex and intake) and put some duct tape over them to keep junk out.

As far as lightening it up, toss the cast intake.... you can take the heads off if you are sure you are not going to use them BUT, I'd rather leave it together to keep all the pieces there and keep junk out of the inside.