Waste of a good short block ?

Just checked - cast crank motor. How do I tell if it's a 10.5:1 vs the 8.5:1 ? Don't mind pulling heads - but all runs well as she sits (little smoke at start ups after sitting - will be replacing seals). I'm on a really tight budget for this resto due economic conditions resulting in job loss/change (oooh, did I say "change", now who asked for that ?) ..... :pukel: