I'd like to know the answer to this as well! I've got the air to water kit coming. I spoke with Rayce for a little bit, and he gave me all the options.. I decided to hold off on the ignition box for now. Going with the stand kit. I plan to start at 8 psi, on pump gas. I will up it to 10 and run straight 110 fuel once I get my AFR settings decently close. I'm going to run on the stock internals until I get some time on it and get a feel for tuning the complete setup for different conditions, etc... Basically going to get my time out of the stock pistons I already paid for. From there, I plan to go with low compression pistons, possible the ignition box as well, and anywhere from 12-14 psi on boost... Depending on how he feels about it. I'm going to test out that bottom end and see what it will take. If it blows, it will go back together stronger. My ultimate goal is to end up running with all of the above, along with a good set of cams, head work, etc, and larger cylinders (975cc @ 98mm seems to be the trend as of late). If this "upgrade" could benefit me enough vs the dollar amount it costs, I'll throw it on too. I've just decided to throw caution to the wind and see how much decently reliable HP this engine can put out when built correctly.
