Big Inch Smallblock

If you want to get near 400 you have to break out the welder because that’s what it takes.
That’s what I’m thinking. A bit of work 99.9% here aren’t going to do. Like you said, just step up on the head. Go to the Indy, Victor or higher W series.

Of course if someone just simply wanted to experiment and try it, far be it from me to say don’t do it.