I have played tenor sax for a while but can not seem to do anything with altissimo fingerings and range. I have a King tenor from about 1970 ish. any advice would be helpful.

I taught my T-sax friend how to play his altissimo and now he won't stop. I'm more of a clarinet player but the way I do it is by lowering my tongue a bit in my mouth and tightening my embouchure. It's different from actually biting harder (but that kinda works too). Using a slightly harder reed always helps too.

Sometimes experimenting with fingerings helps. Not all of the fingerings shown are as good on T-sax as they are on A-sax. Adding the low Bb or B helps occasionally. Try adding a key here, taking off there, etc.