Hi Jeff,
it is doable, but there is a number of hurdles to overcome. First is the height adjuster bar would need to be stepped out to go around the head. The second is the which Rover you are talking about, the alloy bases have step ups for the Briggs motor to sit on and the re- drilling of these could be a problem. I haven't really looked into it once I saw the initial problems. The blade carrier pressed out easily, just closed the hole up about .5mm which was easily cleaned up with the die grinder