hey starfire.....i got an ae82 and you got superchargers and the dashboard......sounds like you should donate a supercharger or two to the cause......
Seriously though I took my AE82 instrument panel apart - i have 2 of them - get the one with the clockface in it (i will sell it to you) then you just take the clockface out and make a mask with a sc meter in it.....easy.....
failing this though i think there is a street machine magazine from 1993- it has a greeny blue FJ holden on the front - this has an article on how to make a custom dashboard. YOu can get it from any second hand magazine store.....