You do need to get you that molasses tank to de rust parts like those pulleys. Cheap and no air or sand needed.
Yeah I've seen them for sale around me. Just need to find someone to deliver one and find a good place to put it. Probably out back behind my shed to hide it. :
Evaporust works great. I have a 5 gal bucket, you can sometimes get it locally at an auto parts store or Tractor Supply.
https://www.amazon.com/gp/product/B00370N1UG/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
I've seen the timing pointers with the lower bracket before, mostly on 80's 5.0 engines. Speculating that was for dealer diagnostic equipment, possible a magnetic pickup. Might be yours was replaced at some time on the past with a later year part from a 351M or 400.