just wondering if anyone can help me

basically my front prop is knackered and have got a recon one ready to go, but 3 of the threads are kanckered in the diff flange and i carnt get the sodding thing off

so how do i go about it, i dont really want to take the diff off due to not having anything to support the engine and and disconnecting everything again lol

my impact gun took my spare one off the diff no problem, but the one on teh car i carnt get just the gunand socket on due to having exhaust and other prop in the way, dont want to take the exhaust off as thats a pain aswell but can move it out the way

i carnt get the car any higher as my jack wont allow so carnt even get a crack bar on it

so i was wondering if its possible to bolt and nut the prop on, by drilling out he threads and bolting and nutting up

can this be done or will it cause problems

or if anyone is strong enough and locally fancy trying to un crack it and ill push on the brakes as i dont have the strength to do it

any ideas please as i need to get this sort asap