How many miles are on it? Odds are that your ring gaps have grown a little. Not .0015", but some. The pistons, however, are hypers, which I've never liked, and which don't like nitrous. A 75 shot used sparingly will probably be okay, but it will take alot of self control. Only you know how well that aspect will go, and that is what should be the deciding factor, IMO.
Take care,
-Chris
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