My 64 300 came with a 413. I rebuilt it, put on 906 heads, added the Street Hemi grind cam, a 750 and 4.10 gears out back. It scooted well enough.

But it didn't start as a MH 413.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.