Was this upgraded Tiger II scheduled to have standard torsion bar suspension or switch to cantilever suspension as on the E-75.I am building the Trumpeter E-75 with the standard 88mm main gun and adding the ball machine gun mount to the front glacis.Thanks for any help.

The short version is that there weren't concrete plans for changing the suspension of the Tiger II at the time. The E-75 was a test bed even if had been produced to try out new components for future tanks, plus we still don't know what turret design it would have had.

As far as I know the July 1945 modifications for the Tiger II did not include any changes to the suspension.

There were a lot of paper plans and proof of concept studies by wars end. No interruption of production could be allowed though. As to the E-75, contemporary Russian and British tank designs appearing post war also deleted the bow machine gun, so not really required to retro fit. In my opinion.