Max PSI out of stock block?

Corral is absolutely ****ed up for me right now, if I edit a post it ends up getting deleted and when I make a new topic or a new post it rarely shows up on the screen...usually it lets me make it then it never shows up, but onto my question.

I have a 1990 GT Hatchback with BBK Shorty Headers, MAC O/R H-pipe, Magnaflows, MM SFC's, K&N Filter, MGW, Strange 10-ways, Griggs LCA's and FRPP UCA's.

I got the car from the man who bought it off the showroom floor, it was babied all its whole life and was never beat on...the man was a Colonel in the Navy. It currenty has 120k miles on it and burns no oil, runs real good, never had a problem with it.

I am hesitant to tear it down and do HCI because I don't want to potentially ruin a good motor but i NEED more power. I get a free nitrous kit from my work and I was wondering what the MAX PSI I could run if I were to bolt on a supercharger, not running nitrous just the SC. I want to keep it below the 450WHP limit of the block, while still being able to run some sort of nitrous shot just for the small cooling effect while also adding HP.

I don't want to get into intercoolers/aftercoolers or any SC kit over $2,200 so I am pretty much limited to the Novi 1000 and entry level Vortech.

Also, in a recent 5.0 Mustang Mag they put 17lbs of boost through their Fox with HCI and stock block...granted it is a timebomb how can they get away with it? Also, the two SC's I can get max out at about 15psi so would I be able to run that through my engine safely?

I am not sure if running at 15psi would cause me to blow gaskets or something, I know I will still be below the 450whp limit of the block seeing as I have about 220whp now.

Thanks for any and all help!

Yea of course I would be buying a new fuel pump, injectors, maf, and tb because I will be boosting it at 10psi MIN. I want to take it as high as I can go, I just dont know if I will be able to run it at the capacity of the Novi 1000 which I read was somewhere between 12-15PSI.

What is the max PSI I can run without supporting mods? 8?

Thank you!

How much PSI would I be able to run before I look into getting new gaskets? Or an intercooler?

I would prefer not to pull the heads off of the car, seeing as that is why I am debating doing a SC in the first place...instead of HCI.

Thanks!

What is your setup to be able to run 16psi? And how much HP increase would I see on a stock engine?

ttt!