^ What he said.. along with everyone else.

These motors are not worth rebuilding. There used to be a Swan stroker setup that raised the displacement to 4.2L. From what I've read the gains were not worth the price on the kit... plus I don't think they are available anymore. But yeah if you pull the crank for new bearings you will need to align bore the journals. Unless you have a bunch of machine shops at your disposal... forget about it.