I have a 69 351W that was stroked to 393.. all relieving has been done. The block was completely glyptol'd inside. It had twisted wedge heads that dropped a valve on one cylinder. I cannot be sure at this point since I'm still pulling the engine out, but I believe it might have cracked that one cylinder wall since I found water in it when I tore the head off. The block is .030" overbored and had approximately 4,000 miles on it when the incident occured. If cracked it could be sleeved, but I have a new Dart block 446 that's going in so I haven't investigated any more than a quick visual. Bottom end is great, but I believe another member here wants the stroker crank and kit.
If you're interested in the block at a very reasonable price email me.
Bill
fxbill@comcast.net