For technical reasons alone (use of 950/951 cartridges) this should be possible.

Should be safe. The printhead fits all HP printers that use the 950/951(xl) cartridges.
Start-up must be done with the supplied setup cartridges (last about 1/2 as long as "normal"), when they were used up I then inserted the cartridges from my old defective printhead and "used them to the end". i.e. if you have a defective printhead do not throw away cartridges that still have a usable filling level. (Exception: if the cartridge lock was activated on the printer, which prohibits the inserted cartridges from being transferred, this is intended to prevent "cartridge theft" in the office environment).

Yes, it fits your device.