The Model G handles 6.1 cu. yds. struck and 6.5 cu. yds. heaped.
It would be closest to (little less) than a 1Dxxxx #60 and weighs about 2,000 lbs less at 10,250 lbs..
The width of cut for the G is 96", the 1D is 84"
I don't have any info on it's hydraulic conversion.