Normally, a change to a newer engine is the accepted practice.
In this case, a change to an outdated engine (discontinued in 1965) of a different manufacturer is the confusing part. realcrazy

Are you going to take your new Mustang and put a Mopar 340 small block in it?

It's a confusing custom that nobody likes, Chevy guys don't like it, Mopar guys don't like it. catfight
Ford guys will think its funny. haha

Yeah , it needs ... weld sawzall