I was under the impression that 3bII engines where marked as such on the block. I picked up this 3b today expecting it to say 3bII but it does not. It's significantly different from all the other 3b engines I've had. It has a integrated vacuum pump built into the timing cover, an exhaust manifold that looks like a 14b and rocker cover that's resembles a 14b as well. Rotary IP and torque to yield head bolts. So is this a 3bII or just a late model 3b?