Just wanted to add to this thread to confirm information posted above. I removed the D24T from my 83 760 today, fully dressed with AC Compressor, Alternator, PS Pump, Fan, even has the oil filter and a pan full of oil too. I was shocked to see that it only weighs 477 LBS.
In comparison to the gasser Volvos, I pulled the B230FT from my 745 Turbo last week and that weighs in at 365 LBS. Only 112 LBS difference.