it'd probably handle 8psi if you don't beat on it, but yeah i'd tend to pulley 'er down a few psi. i did help tune a ~10psi turbo thing with no intercooler on a stock lt1, and we had a lot of...

you probably just need to adjust your maf table to fix your overall fueling. dont use a 3 bar sensor, i tried, there isnt enough resolution for it (unless you run really high boost)

are you using...

really depends on your approach

speed density, or pull through maf?

what map sensor?

if you use the stock map sensor it works ok but you're stuck with a totally fixed timing advance in boost...