Interesting set up on that thing that goes round and round and works the fuel pump lever. The new engine had two of them things. One as on the original engine and one that also "spins" to take some of the pressure off the fuel pump rod.
Historic, this is known as a 2 piece fuel pump eccentric. I had to hunt one of these puppies down to work properly with my hydraulic roller cam/timing chain set and old style timing cover. The 1 piece would not fit, was ~1/8 too big and touched the timing chain cover. Spent some time on :SNSign: learning about all these damn variables before getting the right parts. Nice pics, good luck finishing up with the install.