One thing to take into consideration, if the new seal will ride where the old one was causing the groove then go ahead and position the sleeve at that spot. If the new seal is more shallow or more deep than the original then you want to position the sleeve where it will allow the lip to ride on the sleeve.

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy