Depends on whether you know what the hell you're doing.
My customers don't get bent over and I don't reside at Fantasy Island.
Those numbers are easy to achieve and the motors live to see a lot of days of cruising and rodding.
Everybody freely uses the terms "Used to" and "Way back when".
Those days are long gone.
For decades, these "antiques" have remained my livelyhood.
It's not rocket science nor difficult to achieve if you remember what you learned in school and the repeat business of a good Flathead build.
Simple enough.