also a decent water/alcohol aka washer fluid injection system will also cure the issue and give you the protection against detonation..have run boosted engines with much more static than you are on 89 no issues either..that would be your cheapest and hassel free deal...Rob

U can always flycut the pistons and do some chamber work on the heads ..u should be fine.
Cheaper then buying new pistons at around 800 incl rings....IMO

aluminum heads i would go not higher then 9.8:1 and on steel heads 9.5:1 in a boat if u want to run pump gas ( 93 Octane ) !!

I don't like to see squish getting much beyond 55 thou in order to get a more efficient burn, and reduce detonation. I would slap on a different set of good flowing AFR heads. You would get near your desired compression, and probably keep the same or gain some horsepower due to the more efficient flowing heads and combustion chamber. If you already have a good set of heads, you can have a good head porter open up the chamber volume some in order to reduce compression.

Chris

It looks like you have so closed cooling and a good shortblock. I agree with Baddog. It could be same cost if you factor in everything.
Steve

Thanks for all the replies. For the record, I am running AFR heads already. I placed a call to Wiseco today. I am waiting for a definitive answer from them as to whether it would be possible and cost effective to simply mill off the domes and cut valve reliefs into my exsisting pistons or just order a new set. Either way I go, they seem confident they can make up the weight loss with a bit heavier pins. That way, I dont have to balance the rotating assembly again.