While I'm on my long quest for the perfect GN {ok ok, their all perfect:redface:} I've never considered anything other than a hard top. I'm not a fan of mid/late 80's GM t-top build quality. However I do find an occasional cherry GN with astroroof. 1987 Buick Regal Grand National, $24,995 - Cars.com Are these problematic? The car will see no track time. Thank you.