Dave, I have a what I believe are 2.76 gears, and it's a posi unit... But Mine is out of a 79 TA for the rear disc... and that would be the 8.5 I believe...
But yes, also check with Randy's Ring and Pinion as they are one of the clubs (Western Washington Firebirds) sponsors for our show each year... mention the club, and perhaps you can get some kind of discount?
Also David Morton just in Redmond, had his rear end work done at a shop in Totem Lake, and said they did a great job for a great price. Maybe email him for info if you still have his email addy? If not let me know and I'll send it to you!
Brett - 67 Drop Top 455! brettnheather@hotmail.com