Just make sure you have enough time to dedicate to the project. I have seen so many actual classic cars disassembled by their owners only to have schedule changes or a loss of interest leave them as spare parts in greasy boxes in a garage somwhere.

Another option for you. Rather than butcher your current CE with engine swap hell why not get an additional CE. It sounds like you drive it every day. With two cars the mileage would be split in half on them both and if one goes down you have the other. Cheaper and easier than engine swaps.

Just an FYI. I have driven cars that have had engine swaps. It takes quite some time to get them completely sorted out. With all the Vacuum lines and electrical connections sometimes things are connected wrong. I owned a car and had to have a new engine put in it (japanese car) and it took months to solve some issues with the transmission shifting funky from time to time.