Degreeing a Cam, or not.....

Your crankshaft at Top Dead Center has not changed.

You advanced the cam 8 degrees and this advanced the ignition timing at the same time being the distributor is driven off of the camshaft.

Your new valve timing events are bringing in the fuel charge earlier.

Would think you would still want your initial ignition timing at around 15 degrees advance, not at the 23 degrees advance as it is set now. As an example ^^^^^.

The fuel charge is in the cylinder, when do you want to fire it? Too much advance and it is fighting itself as the piston is trying to get over the top, then back down the other side to do the work.

Take a timing light to see where it is set now, then back it down to your original desired settings.