Builder, The new seal fits into the same space and is held in to the groove just like any late model lip type seal. It essentially rides on the same part of the crank as the old rope seal. Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes 1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes 2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans 1947 Willys CJ2A w/F-Head engine