Help understanding the engine bay

Too funny.

O p what I see is a vacuum tree they can simply just be removed and a pipe plug put in. I guess they didn't have one so they thought rubber caps would suffice. I also see an oil sender it should be going to the back of the block but that they have some kind of crazy line going to instead and some pipe bullshit , so you'll want to unscrew that and put it back where it belongs. Now it seems this thing had a carb kit on it to which was like a early clean air device ran by vacuum you can take all those off or leave them unplugged because I doubt any of that stuff still works and you don't need it in the first place. On the radiator that's a thermostatically controlled vacuum switch for more of that carb kit early smog type crap that's not hooked up and just bolted to the wall...it would have gone to the air cleaner , probably opening the air horn duct to fresh air instead of off the exhaust manifold heat hose. Its possible that with that vacuum tree removed... there's enough room to mount your coil like it's supposed to be.. off the back of the intake and sideways.
Youre missing trim/plates for the fan motor and heater hose inlet/outlet.