You can do the budget PAIR valve blockoff at least to get good readings on the dyno, there's a thread here that shows how it's done. Your results do sound low, maybe also load in the Dynojet map for the full long Akro system and try that next time.
I have the dyno runs on paper but no chance to scan them in yet. Will upload when I get a chance. Don't have the a/f reading available btw.
Was running really rich on the dyno though, backfiring like no tomorrow.
Have a track outing coming up this weekend, and no time to go back to dyno it again before then..
But now have installed what looks like the correct 'Euro' map for the akra full system from the PC website and will see how it goes!