[60 Biscayne]

Roller bearings are nice but if push comes to shove any good machinest can make you a brass bushing that will work just as well.
Someone that can read a micrometer, calipher & veneer loves these kind of challenges. He has to measure the diameter of the hole in the crank to determine the diameter width of the new bushing. He should make the bushing width diameter a little heavy +.002 so that it doesn't spin when its installed into the crank. Best fit is when you have to heat the crank with a torch a little & the bushing has been in the freezer overnight slap it in and when it comes to ambient temp that bushing isn't going anywhere.
The I.D. diameter should be a hair light .002 or .003 so that the nose of the trans spins freely. Don't forget to lube it up with some Grease and your in business!
This is the old fashioned tried & true also cheap method of coming up with a piolt bushing. It worked on the real Blown Chrysler (392) Hemi's, 409 Chevies etc. should be duck soup for a little Jeep motor!
Jim