Ok, will limit boost to 10-12PSI by throttle.
How do I check:
The wastegate line? With air pressure, the turbo end should be open and the wastegate end should be closed until about 12PSI, then open, right?
The pressure switch on the intake? And what does it do exactly?
The overboost valve? It's supposed to cut off boost and let the ALDA drop to 0 PSI, right?

Thank you very much for the fast reply.

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I suggest we solve high gas prices with environmentalists... unfortunately they don't burn well.
1982 300CD, 220K miles: This vacuum system will be the death of me yet! (OBK #26)
1977 F150 400 C6 2wd, 10.2 sec 1/8 mile with 2.75 gears.
1965 Mustang. Mostly stock... LOL!
2001 Ram 2500, cummins, 5spd, 202k miles.(girlfriends)