NAPA made a roller bearing to adapt a manual to an auto crank. T-Flite paddy (SP?) made a bushing to make a small snout auto convertor fit a larger bore >67 crank. Not sure if you need a special roller but I bet the roller bearing would work.
check out these part numbers and see if they call out any critical dimensions that you are seeing:
Pilot bushings
Standard. .941 I.D. ~ .750 I.D.
Napa-Balkanp 615-1026
Federal Mogul PB286HD
Undersized N/A
.914 I.D. ~ .750 I.D.
Napa 615-1034
Pilot
needle bearing
Bower PCA FC69907
National Bearing FC-69907
Mopar 53009180AB
MP P5007051
