Will one of these work?
https://www.ebay.com/itm/80-91-Ford-F-150-250-350-Truck-Front-Captains-Chair-Seat-Arm-Rest-Left-OE/264115349414?hash=item3d7e8067a6:g:AZYAAOSwfBBZk6oo
https://www.ebay.com/itm/80-91-Ford-F-150-250-350-Truck-Front-Captains-Chair-Seat-Arm-Rest-Right-OE/254050507041?hash=item3b26971921:g:NR0AAOSwaKRZk6nO
Pete,
That is how the originals look and yes, they are hard. Adjust until it just barely touches the underside of the hood.
https://www.ebay.com/itm/NOS-1980-1986-FORD-F100-F150-F250-F350-BRONCO-UNDER-HOOD-BUMPER-E0TZ-16758-C/392964589134?epid=1711200636&hash=item5b7e83c64e:g:umIAAOSwz2pfdYUD
https://www.ebay.com/itm/NOS-1980-1986-FORD-F100-F150-F250-F350-BRONCO-UNDER-HOOD-BUMPER-E0TZ-16758-C/164685618414?epid=1711200636&hash=item2658071cee:g:qzYAAOSwnuhgHDAD
Something like this might work...
https://www.classicindustries.com/product/k2017.html?utm_source=bing&utm_medium=cpc&utm_campaign=shopping-catch-all&msclkid=93e0a5d62c1c136d1124c5e362731834
Not much detail and expensive...
https://www.ebay.com/itm/NOS-OEM-1980-1981-1982-1983-1984-1985-1986-Ford-Truck-Radiator-Support-Set/224359605671?hash=item343cdfe5a7:g:1aIAAOSwuzFgMbHK
For 4.9L with Super Cooling or A/C.
https://www.ebay.com/itm/NOS-1985-1986-Ford-Bronco-F150-F250-F350-Cooling-Fan-Shroud-300-4-9L-E5TZ8146F/313427596354?hash=item48f9bd9442:g:QBYAAOSw1qtgMrbI
True story: A friend at work has an old Ranger with a Fred Flintstone hole in the floor [not too big]. I gave him a couple of my old and not too pretty license plates. He cut the rot, applied some sealant, drilled holes and pop riveted the tags in place several years ago and the repair is still holding!
Cory, as Jim mentioned, the cowl appears lifted in the middle. If attempting to mount the wiper blade arms, is there sufficient clearance regarding the two splined shafts? Compare the available splined area with your 1984.