I see a few things to comment on.
The gelatin level is rather high compared to what I make. The silver level is a bit low compared to what I make.
The emulsion will be a normal Cl/Br paper with a rather slow speed, say about 2 - 6 stops slower than current enlarging papers. I can't really tell without testing it, but that would be my guess due to the lack of sulfur sensitization. If the formula assumes active gelatin, then I would not care to predict the contrast, but it could be quite low.
Most published formulas omit telling you that they use active gelatin or that they use a sulfur sensitization step.
I would use 10% glyoxal instead of chrome alum.