Effect of MisMarked Damper +5 degrees?

piston rings cause blowby and those look like really low numbers for a stroker??
Yeah, this is before tuning, a worn out convertor and with the excessive timing. With tuning and the new convertor on slicks it did get into the 12 teens.

When we took it apart, the rings looked good, but the cylinder walls were smooth. Still not sure why I had so much blowby, unless the rings were collapsing, or just never seated well. I am now hypothesizing that the excessive timing may have been partly to blame.