Those numbers look pretty good for your mileage. My car has about the same mileage and PSI numbers and I'm pushing about 8 #'s of boost with no problems ( yet ).
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Good luck!
Brad R.
1992 L.X. 5.0 coupe
MODS: A few little bolt ons 
New Best time ...11.60 @ 128 mph @ 2000+ ft altitude.
Rice Haters Club member #39
Users rides #2542
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