400 BB Mopar dyno test

I don't think a better rocker arm is a bad thing...it doesn't take long before the pushrod can push it's way through the stock rocker arm at 6000+rpm and 280lbs. open pressure. I wouldn't chance it if I wanted reliability.
Yes, it's only a mild 400 so the 750 worked flawlessly. I did have to jet it up quite a bit, so a larger carb would make more power, but will also use more fuel and have less lowspeed TQ.
I'm guessing the smaller headers would have worked better for a larger heavier car, or a real tall gear. It's all in the application!!