Cheers 38ac.  I spoke to the company supplying the sleeve.  There are no machining, fitting instructions with the sleeve.  The local engineering firm that I spoke to are not familiar with sleeving such an old engine but are able carry out the work to a very accurate tolerance hence their questions about the fitting. As yet no one else has offered any help with sizing, tolerances, and pressing pressures, etc, on actually fitting this sleeve to my block. I'll give it a few more days before I decide.
Cheers for your comments so far.