The shop manual depicts several braces between the accessories and the motor that my L98 seems to be missing. The only brace my motor came with is between the AC compressor and the front of the intake manifold. Missing are braces between 1) the AC compressor and the third PS exhaust manifold stud, 2) the alternator and the first DS exhaust manifold stud, 3) the alternator and the intake manifold, and 4) the first PS exhaust stud and the serpentine bracket below the AIR pump.
Is fatigue/ cracking of the brackets likely with one or more of the braces missing?
Which is most important? (Probably #1 which will interfere with my wire looms.)
I've never seen motor with both alternator braces, overkill maybe?

I'd just grab used parts, but TPI motors never seem to make it out to the yard.
Any thoughts?