Got an open 3.23 rear which I will keep for long trips and found a center section for sale with 3.55. For the 3.55 I would like some recommendations or experiences from folks of the aftermarket sure grips your using. I am considering Randy's Ring and Pinion offering [smooth] and also a Doctor Diff helical sure grip. This is for my "Big Boned Gal" 69 Fury that is street driven not raced. {hopefully I would like to take her to the strip once in awhile.] Any thoughts on any brand /type would be appreciated.