what do i have here

IMG_20201012_110915759.jpg IMG_20201012_110923020.jpg



i got this 340 years ago probably 25 or so its casting date is 8 18 68 and the timing tab is on the opposite side . i just noticed it does not have a harmonic balancer as you can see . is this how the early 340's were made ? it also has no vin stamped on it .