I should have clarified that "fixing" my old ones meant upgrading. Despite the issues with dying 555s lately, I got a deal on this set as a stopgap given the work/cost of 740s/fuel rail/etc. I know SZ didn't want to pull a plenum anytime soon and I don't have time with a new job.
That and 22psi isn't something I'll really run. It was just to see how much I could make. Still not ideal for the turbos...if you want them to last =)