Should be possible,if you went down that route,then only the ecu should need changing.I know the ONE around the ingition barrel can only be programed once.
passenger seat is plug and play,drivers seat on the elite needs an extra 0v(earth) perminit live and ign live,rear seats should be put rear heated seat switchs in, then the wiring from the plug under the rear seats to the rear seat.(a small wiring harness with two relays in it.hth charlie
The pullys would be different from a petrol one as the td is a 5pk(RIBBED) and the v6 is a 6pk(ribbed),I think you are right about the second hand route as most td have done space ship miles so not going to last to long
ON my project 2.2dti the eml light was working but the handbrake light wasnt,I took out the eml bulb and put into the handbrake lamp now the eml does not work with any bulb in,is there a fuse that could effect the eml light