Maybe there is no way to do it right, and the engine must be pulled first!
It is a Chevy, they are not designed to be worked on.
It is a Vette, the Top of the Line night mare to work on model.
If you want something that you can work on buy a Mazda or a Ford. But they don't break down enough to keep a shade tree mechanic happy getting his hands greasy. So maybe you should just stick with the Chevies so that you can be happy busting your knuckles.