You'll have to test it to be sure, but making the rod longer (easier to open) will reduce the boost pressure.
Don't waste your money on the air/fuel ratio gauge as it's worthless unless it's a true wideband.
If it is a true wideband that your buying i'd say wait on that and put that money into the tuning first.
10.7:1 compression and fmu do NOT mix very well, esp 12:1 ratio and 8psi...
Do yourself a favor and invest in another form of tuning if you want the motor to last.
If you went with hondata (may seem expensive compared to a fmu but it's well worth it trust me) and larger 450cc+ injectors you can make upwards of 300+whp with no problems. Running 10-12psi will be no problem. Sounds like you have a nice motor, don't blow it.