Hello Flatspin,
Our gearsets would be significantly stronger than that stock gear. Not only is that gear 35 years old just in actual years, but metal alloys and heat treating have come a long ways in that time frame. A brand new replacement would be much much stronger.
And because of the huge popularity of the 3liter spec series in the POC and their stock gear requirements, we have recently started producing the stock NT ratio as one of our gears. I don't think Albins even makes the stock 3rd ratio. I know they didn't when they used to cut gears for me. Of course, I've also got a pile of cheap good used if you want to attempt to repair this on a budget, but that's not the strong way to repair it.
I also agree with Hayden that you would want to really closely inspect your 7:31 R/P. It could be done. This may be a more expensive repair than you are currently thinking and just finding a new core to build on may be the more cost effective approach.
If you do need a new ring and pinion, I can help there as well. I've got good used or NOS as a 7:31 as well as our own proprietary version which is 8:35 instead. It's about the same decimal ratio but significantly stronger.
Anyway, drop me a line if there's any way I can help.
Kind Regards,
Matt Monson
Guard Transmission LLC
303-530-1094
gtgears@yahoo.com