Found It!
I was somehow reversing the address bits from the sheet for the x30 address space! Sheesh was a moron!
The following works like a champ:
Lkup_out:
'This subroutine will look up the correct board address for the I2C communication
lookup outvar,[0,$20,$22,$24,$26,$28,$2A,$2C,$2E,$30,$32,$34,$36, $38,$3A,$3C,$3E],outboard
return