Why do I keep breaking rocker arms?
I used to argue all the time with V8 guys when I was a slanter. It's not that the slant 6 can beat every engine out there when modified because it can't it's just that it's so neat it can go down the road as fast as it can when you do the right things. Obviously a lot of that reliability starts to trade off but it's that reliability that puts a slant owner on the high horse to begin with being so sturdy and like a wounded soldier carrying others off the battlefield it can carry on much easier/longer wounded than a wounded v8.
Even for the v8...theres a bigger more powerful contender called tthe v10..v12...etc. No reason to argue. Do what you like and don't be insecure about it.