There might be technical issues, however if they overcome it, I think it is a interesting idea. They would probably attach Chobham fuel probes. I don't know if they plan to install fuel tanks in the cargo bay or if it is feasible.
I think this was earlier posted here
http://idrw.org/now-israel-jumps-into-i ... anker-war/
Reconfigured 767-300ER can also be used to transport 200 soldiers or 60tonnes of cargo when required by the customer . according to Bedek Aviation Reconfigured 767-300ER is 15-20% cheaper than other alternatives, while delivering the same level of performance and operational requirements for the customers, like its alternatives.
India already has been offered Airbus’s A330 multi-role tanker transport, which has been twice rejected due to high procurement cost, while Boeing is now ready to offer its KC-46 multi-role tanker transport aircraft but it wants it through U.S. Department of Defense’s Foreign Military Sales (FMS) program and not through the Tender process. Russian offer of Il-78M-90A Aerial Tankers has been rejected by Indian Air force due to its low operational availability issues which are usually associated with all Russian Ilyusin-76/78 aircraft type operated in IAF fleet.
Boeing and Bedek Aviation both use Boeing 767-200ER aircraft has base aircraft to develop military aerial refuelling and strategic military transport aircraft but since Bedek Aviation uses a refurbished 767-200ER instead of a new one, procurement cost comes down significantly, while operational cost practically remains the same and similar converted 767 MMTT tanker has been successfully sold to countries like Colombia and Brazil.