I just did that flight and VNAV (sort of) worked as expected. It didn't capture properly at 1000ft AFE but I believe that is a captain sim issue. Again most airlines don't allow VNAV selected on the ground on the 757/767 so I've never tried that before. I recorded a video and I'm uploading so you can see. One issue I would say is you had max takeoff power selected, which at that weight is a lot. I could barely keep up with how fast the airplane was accelerating (which you'll see I was late retracting the flaps). A de-rated TO-1 and CLB-1 would've probably been perfect.