Hi; yes they can be. The mounting holes in the block are the same; but the steel bracket that attaches to the block can vary in design. They could also have been modified through the car's life. Your '69 4/4 will likely have a rectangular rubber mounting with the steel bracket that attaches to the block bonded to the rubber. The later design that I am trying to source has a Ford designed steel bracket (typically from a Cortina Mk 3) which then needs a rubber donut with a threaded stud on each side. This then sits on a chassis mounted bracket bespoke to Morgan. See photo link: https://www.dropbox.com/s/oxb9ew8v4d89sw8/711M%20Engine%20Mount%20Bracket.JPG?dl=0