I think they are still to be found. You just have to do some investigative work as to what regional sector of the country had them most for a particular reason, then go garage hunting.
They are lightweight and reasonable I suspect. Short wheel base may call for a bronco type handling and loose canon upstairs.
Even the 401's, 390's and 343's are great running engines. No need for a chevvvvy, but Chevvvy's are very retrievable.