By blown, you mean blown up? or supercharged? even though it wouldn't be cheaper, I'd say start with a new core and avoid potential age and stress issues for another 20+ years. This is assuming you only need the block for the core. engnbldr.com has them for $498 with free shipping.
Ah, gotcha. wish I could help with that. The best I can do is point you to picknpull and say pick up a shortblock for $150.
