Axle Spacer Thoughts - Feedback needed

[Android04]

Hello my GM Family and this thread might not go anywhere but had some thoughts this morning and figured I would start with the professionals first.

So my brother recently had his Full Float cut down by 1.5" on his Blazer. As we were looking at axle options I had the random idea of machining a spacer between the axle and hub.

The thought is to machine a spacer that will bolt between the axle and the hub and run the factory metal gasket between both, and the obvious longer bolts. Being a full float I think it might work...

This is just going to be a driver, nothing crazy or off road stuff. What are your thoughts? Suggestions? Weak points? Talk me out of it!