compression ratio, '88 5kcstq (motor)

[Ken Keith]

What would the repercussions be if I were to put a 2.5 liter bottom 
end in my MC motor, with a compression ration of 8.5:1?

Would I have to make any other modifications to compensate for it, 
to keep it from blowing up or something?

The way the car would be setup, ideally, would be with a SJM chip 
and spring, free flow exhaust (3" straight pipe after the cat?), and 
Bosch bypass valve.

Would I need any custom code for the chip?

Thanks,

Ken