What you describe as higher temps after a t-stat swap appears to be increasingly common. There have been a few threads on it recently. It may be the t-stats are of lower quality or the bypass function isn't working the same as the older t-stats.

If you have an IR gun, verifying the temp in the cluster would be a good start. Check the connection for the gauge.

With all new parts, I'd expect lower temps than 100 based on an ambient of 47. That assumes the parts are all good, of course.

The t-stat housing is supposed to be self-bleeding, but getting all the air out by elevating the nose is also a common recommendation.