Well I finally made up my mind and got 3:73 rears. It was tough to find, called the local junkyard and they wanted $300; went out to their other yard and made the deal with them on the same axle and got it for $100; picked it up today from the first place, tossed them a Hundred and walked out the door.
I even had them save the emergency brake cables. It's now setting under the coupe. Hope to have it up and running by Fall.