Re: Crossfire Modifications
Suspect you would be surprised how many here date to the first half of the last century.
That said, I would not swap an engine unless the original was blown. However if you could see the crank from the side, I'd probably replace with a US based engine and am really a fan of "even fire", an odd fire engine can never sound like a XK Jag on bananas or Corvair on trombones besides even fire is a lot easier to tune.