As far as i know, the spicer 23 is the same as a dana 23 and is a mirror image of the dana 24. Same rebuild kit works for all mentioned.
Spicer is a Dana brand, so they would very likely be the same.
From the Dana.com website.
1946
Spicer Manufacturing Corporation is renamed Dana Corporation in recognition of Charles Dana's 32 years of leadership. Spicer becomes the brand name for the company's driveline products.
