I think the engine looks great! If you're after authenticity, here's what I see:
- The fan bolts, coil nuts and starter cable mount nuts and washers should all be natural. Same for the bolts that secure the starter to the block.
- The clamp that holds the water distribution tube to the head should be gloss black.
- The upper generator bracket (I didn't see it in the picture) should be block color. Same for the bolt that holds it to the water pump.
- The distributor adapter (the part that mounts to the block) is supposed to be painted block color according to factory photos. I've seen original cars with it in natural color so the decision is yours.
I like your work !