Hello 32 coupe,
If you enter "gib key puller" in the SEARCH function on this site you will willfind many useful suggestions on record there. Would be very careful with heat if as i suspect, the Indians have "fitted" the key with the 10 pound fitters tool. You may just create a crack at the point of greatest stress in the flywheel keyway.
Had written a detailed procedure for making a guide and drilling the key, but the site would not allow me to post until I had reviewed replies posted while I was writing.
Failed to save it, and lost it. If you think it useful, I can write it up again, though perhaps not tonight, getting late. Hope you succeed without too much drama,
Regards, Combustor.