Compression question, engine safety on 93 octane

[RacerXJ220]

I'm using a 1J head on a 2J-GE block, and I have a choice between either a stock 1J headgasket, or use the 3mm HG (8.3 ish : 1) I have from cometic. I am running 274 degree 10.3mm lift cams with 1mm OS intake valves.

I'd like higher compression (9.2:1 ish I think) with the 1J headgasket but how safe is this compression under boost with say a GT40R on 93 octane with a Blitz tuned ECU for 550cc injectors ?

Would my max PSI change since I'm using the 1.06 housing?

-Or-

Would it be a lot better to run the 3mm HG?

I'm going to wait and use the stinger later on. I want to enjoy my car right now The head is not on the car yet.

 

[tissimo]

Run the higher compression, just keep the boost around 15 till you get the standalone and can dial it it in. I wouldn't go more then 17 psi on 93 with that compression (I like to be conservative).