12 bolt rear strength

[OKGMC4]

I did a search and got a ton of info on the 12 bolts and how weak they are compared to 10 bolt 8.5" and 12 bolt car rear ends. I get that part, I don't plan on drag racing my 69, but it will be more than stock. I want to build a 5.3 to about 450 crank hp naturally aspirated and put 345 30zr19 tires on it. Will these rear ends take that kind of power and live? I only ask because I've seen ls1 F bodies get that kind of power through their weak 7.625 ring gear 10 bolts and survive. I've also seen 12 second LT1 vettes running dana 35 rear ends. Surely the truck 12 bolt is as good or better than that?