Dave my experience with both is dubious to say the least, my dad gave me as a graduation present a 1980 Z-28 loaded to the gills, at 20,000 miles the harmonic damper started to rub on the timing gear cover, the carb started to go south, the tranny was making strange sounds, so I traded it in for a 1981 Corvette, that was the year when GM in it's infinite wisdom unleashed on the public the three Cs from hell, Computer, Command, Control, I had to get rid of the Vette with 9000 miles on the ticker, it would turn itself off for no reason, the roof leaked, electrical gremlins all over, so I traded it for an 82 Datsun 280ZX, one of the best cars I've ever owned, till my dad borrowed it and neatly wrapped it around a light post, luckily no one was hurt, ZXs like 911s had semi-trailing rear arm suspension so if you went into a curve fast and stepped hard on the brakes the rear would break and you would spin, this is a great feature if you know how to use it.
