in theory the part numnber is a 84 year and the 302 have been 50 oz since 81 so technically in a perfect world it should be a 50 oz. might wana call your closest dealer see waht that number fits
I also have a balancer in the shop that I wasn't sure of so when I read your post, I decided to look up the numbers for 5.0 balancers...they are as follows:
It didn't say 5.0 H.O., so I assume it means non H.O. as well...you're not showing enough part numbers and none of them match what's listed here anyway, I hope it helps.