How to identify a non lockup A999 transmission with pics!

Fender tag should tell.
No, it won’t. Build sheet would but not the fender tag. And even then, you’d need to know what the code was.

Trust me, its a 904. And again, even if it was a 998, big deal.

If you want a performance trans, build one. A 998 isn‘t really going to offer a better starting point than any other 904.