And, for the record, I've found bunches of 2:76 and 2:94 clutch style SG units in the big C's of the mid 60's, a much overlooked place to score a clutch style SG rear end!!!
Very true, my 68 fury had a factory clutch sure grip 742 with 2.76s. I promptly replaced that with a spare 2.94 open and the centersection is now in my dart.