The gear lever surround certainly looks std A4LD, 4 speed as fitted to later std sierra.
You can get a adjustable vac capsule on these boxes as I have a brand new one in my garage, that I was going to fit on mine, I also have a shift improver kit, fits into the valve housing and beefs up all the change points, when I ordered one from the states, it was lost so they sent me another, 3 weeks later the first one turned up by which time I had fitted the replacement, company told me to keep it, made a massive difference to this otherwise sluggish box.
I alos fitted a winnebago rv trans cooler, about 3/4 the size of the rad as these cook otherwise, the us cars with the same boxes used air drafting to fan air around and over the boxes to stop this.
Well worth doing a trans cooler on these.
tabetha