Stabil all the way.
I have two old Trans Ams and generally start them up once a year. (QJet carbeb.) A couple pumps on the accel pedal, and away they go.
2005 X2, Viper Red, MCX, OJ TZ-X5 prop, PPass, rear 750 sacs, KGB, IBS, Bennett Wake Plate, custom wake shaper
(previous) 2001 X5, 1991 TriStar 190