Might try this guy. The tractor has been listed for quite some time. Maybe they will separate the two.
https://www.machinerytrader.com/listings/construction-equipment/for-sale/11843645/1956-cat-d6
I've got the parts manual but they don't give the weights.
That’s great that you found a toolbar dozer for your new acquisition. I’d love to see it when it’s installed.
Are you using it with a CAT hydraulic system or aftermarket? I’d like to set one of my 9U’s up with the same combination, but mainly for the toolbar beam for Ag work.
From 1956 price list, #6 Tool Bar Bulldozer Blade Arrangement, including draft members and trunnion group, hydraulic cylinders and bulldozer blade, does not include hydraulic control. weight of unit 3075 lbs, shipping weight 3265 lbs. Price $1320.00
$1320 in 1956 = $12,110.71 in 2018