Necessary for what? I’m planning to ask this small block to make ~950 and I think I can make it survive there. I’m not sure where the limit of the magnum block is, hell maybe I’ll find it.
I have so much big block stuff, I was planning to build a 451. I just didn't know twin turbo & 5.9 magnum was a thing, lol TT5.9mag duh...I guess you already done known this.