360 cost

See how much, if any, it's already been bored. Make sure it's not too heavily rusted. If there's slight surface rust and you're going to bore it anyway, then it's not really a big deal. Some people argue that '74 and earlier blocks were thicker and could be bored more, others disagree. Make sure there's no rust on the bearing surface of the main caps. When & if you get it, have it tanked and magnafluxed to see if there are any cracks that you can't see.