Hi, D-76 as a reversal developer for *222 will probably be too low in contrast. One method you may want to look into is using the stock solution (non-diluted) and processing at a higher temperature to yield greater contrast. Generally speaking higher concentrations of B&W developers = more contrast.
On the chemistry side you may consider adding a bit more Hydroquinone and/or adding Potassium Bromide for increasing contrast/reducing fog. D-19 had more Hydroquinone in it and was a preferred high-contrast developer for home reversal processing. D-76 has no restrainer, so the Bromide should help in clearing things up a bit. Both are widely available through Photographer's Formulary and their distributors (Adorama, B&H, Freestyle, Amazon, etc..). You could also do some tests with flashing the film to compensate for the lower ISO, this can be done after film has been exposed as long as it's before it has been processed. Either way I believe the film is/will be underexposed. I think you'll either have to flash the film or push it. Flashing might keep it from getting as grainy as push processing, but I'm just speculating as I've never done it. Keep us posted on your results, I have a bunch of 7222 sitting around myself. Chris
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