As of now they are incompatable for Albino.
However I am curious to see if anyone has ever breed a Kahl to a Sharp producing what would be Double Het's and cross the offspring. We know Sharp and T are compatable.
To answer your question as far as we know right now only Normal Boa's would result, in the cross between Kahl and Sharp.
"Also, does this change when combined with other genes such as hypo for DH sunglows?"
If you are planning on breeding at this time you need to ensure you have matching traits. IE Kahl Albino crossed with any Het must ensure the Het is Het for Kahl, and vice versea for Sharp. Its typical community practice that anything with Sharp has the name in the trait. IE DH Sharp Sunglow.
Cheers
Jeremy