i know people thatve run 9 happily

couldnt hurt to get some WI in there for safe measure, its a pretty cheap mod and helps with a lot more than just ACTs

also the DCU, iirc the DOHCTTs dont have ignition retard on them (5th injector only i think) so deffo woud be a million times safer (and faster+more responsive) with an ignition controller such as an EMS5/6 (i happen to know someone selling one for VERY reasonable money brand new never used if you wanna PM me)

as for safe boost after that... who knows, jhust get it set up by a GOOD tuner (ie not just any old bloke out of the yellow pages) and let them set it to what they beleive is safe...

i beleive turbosystems are good with these motors, also MSD worth trying, they know a LOT more about TurboTechnics cars than you'd expect!!!