Here is the answer. Just a big N on the center. For steeper gears. Car came with a M-21 and a ZK rear. Guess he must have liked a high revving engine and of course to replace rear tires.
They are out there but goofy expensive. We are going to delicately pick through the rubble to see if we can find the differential and the brackets for the cocktail shakers.
But there are nine vehicles that went up in smoke and about ten thousand plus square feet of rubble.