I have a 91-79 with a 1.00 a/r on my ej207. I have only tuned up to 28psi and my plans are to take it to around 38-40. On 28psi it made 527 on a dyno dynamics. Up here at a mile above sea level 520+ on this dyno runs 10's. On 40psi im pretty sure it will make over 600 on this dyno. I will have a full tune here within the next couple of months.
A graph is in my thread. It can be found at the bottom of page 6.
Its laggy but it goes to 9000rpm.