From what I know (not a lot) it would sound like an engine of 83.5 hp is a 216! Most of these trucks didn't have a 235 until they were 2 tons!

That's a fine looking truck with a lot of potential. The chrome looks great. The body doesn't appear to have more than surface rust. Sure hope you have a great time getting her restored. With those fine photos, keep us up to date with your progress.