instead of using a rubber grommet and just pushing the heater hose through the firewall i came up with this. just a coupler and two barbed fittings that will smash the firewall between the big washers.
i think i found an orange that closely matches
and here is the piece i am going to use for my new dash (rough cut of course)
other than that it was a day to clean the shop after i got off work.