This is a video series showing a Monster Miata V8 swap kit being installed on a 1990 Mazda Miata using a 5.0L Ford V8. You can skip the first video which is just an introduction of the project. Although the video series doesn’t go over every aspect in detail, it does a pretty good process of the build. He also shows problems a first timer would probably run into and some nice modifications to the kit.
Source: The Tinkerer Youtube channel via V8Miata