Allen,
Unless your 14hp is a replacement motor, your block won't be drilled for the clutch mounting. You will also have to switch it to ring gear start, and the electric clutch has no pulley for the starter generator to drive.
If you really want those features, it's easier to swap in a QL engine and harness than it is to make the mods.
The mechanical PTO clutches are good solid units, why not just rebuild yours and get another 20 years out of it???