When rebuilding engines for tractors and the D282 version in particular I would be very hesitant to use any after market parts. They are almost never to the specs that are needed to make them a good performer. I also would be looking at the service manual very closely, for the hours you have we have normally just been into a good head blueprint repair and you should be able to get the next three thousand hours out of it with out to much trouble. You might enjoy the low prices of the after market parts, but if you knew the performance difference you would enjoy knowing that you didn't get a cheap job but one that did help to improve it!