Alternator Relocation to avoid frame rail

I have a 1/4" aluminum plate I could use but I prefer to keep things neat and simple. Cut to shape and 6 holes should do it.

In all the history of Hot Rod engine swaps (Caddy engine in 51 Ford, that kind of stuff) Shaving a frame flange 6" is very minor and this lowly 318 car will never go back to stock. It's not like moving a steering box or reshaping an oil pan. And it's a weight reduction!

But then there's the T-bar crossmember/Tremec interference.
Understood, and I have no problem cutting my car for clearance. The problem is the car is already painted. Not that I couldn't just spot paint that one location, it's more about the additional time my car will be down when I start the swap.