With front blade!!! Some UNCOMMON Cat stuff there, I only seen 1 other (No.64 with blade) on a 6u !!!
You sure that ain't photoshopped? lol!

No photochop here.
The machine was purchased by my dad's neighbor in northwest Pennsylvania new in 1958. He picked it at the factory, the blade and toolbar was shipped by rail to a siding near his farm.
He said 2 mechanics from Caterpillar showed up and finished the installation a couple of weeks after delivery.

I unbolt the "c" frame and replace it with the draft arms for the tool bar. You can see in this picture how the 4A lift cylinders are used.

With the subsoiler fully engaged with the mole attached it gives the 7U a good work out.

 

Phildirt, thanks for sharing those pics.
I thought I'd seen about all the attachment options for the U series D4's over the years but that is most certainly a first for me.

that is very clever how they have mounted the lift into the blade quadrants. looks a bit flash with the fresh paint.
you can even adjust the angle of cut
and yes a single tyne ag ripper that buried full depth would make it bark just nicely.