10blt. 8.2" posi question

[Keith]

A friend of mine has a 10blt. 8.2" in his 70 mailbu and he was thinking about adding posi to it. From what I can tell from driving it, it either has 2.56's or 2.73's. Here's where it gets interesting.....according to Eaton & Auburn, they do not make posi units for the 8.2" in a carrier numerically lower than 3.08s. So, I'm open to suggestions or referrals. I doubt he wants to swap his ring & pinion and I know he doesn't want a spool since he mostly cruises the car.

What should I do ?