The motor is somewhat more than 400 pounds.
Use the same approach to estimating the weight of the sheetmetal and substract that from 3300 or so total... Bed about 300 because two guys can lift it. Front clip about 300, again because two guys can lift it. Cab takes four guys so call it 600 pounds. So take 1200 from 3300 and you have 2100 pounds.
I'll stick with my estimate closer to 2000 pounds. You would sure be better off preparing for too much rather than too little...
