Cross-Figure Genesis 3 is a program that allows you to use Genesis 3 Female hair and clothing on Genesis 3 Male and vice versa without using AutoFit. There are some extra steps using it with Genesis 8, but you don't have to be able to use a modeling program (unless you want to make a better ID morph after you're done, but we'll get to that).
Here's a YouTube version. You'll have to turn your sound up. Sorry.
Genesis 8 Male and Female
Instructions G8F to G8M:
Load Genesis 8 Female into the scene.
Load a piece of clothing or hair onto Genesis 8 Female that you wish to convert.
Go to the Parameters tab. If you do not have one, you can create one by right-clicking near your existing tabs and finding it in the list.
Click on the tiny button at top left of this