Balancing fixture in action. I had to add a 2mm thick steel plate to the adapter. The 2mm plate followed the same contours as the underside of the adapter. As you can see, I had to remove as much material as seen in the picture to recreate the balance. I also had the timing indicator and adapter and weight zinc plated to recreate the factory look. All bolts were secured with LocTite and the front pulley was installed and torqued to spec. The tapered sleeve helps it stay rigid to the crankshaft, which is a worthwhile addition with the added weight.
Since we're nearing the end of the engine build the following posts will be continued in the 65 GMC build thread, where we install the engine.
Any comments are, of course, welcome