Complex sentence: The TC featured a detachable hard top with opera windows and a manually operated cloth convertible top, the detachable hard top was removed from the 1991 model year (which would prove to be the cars last).
Split into simpler sentences: The TC featured a detachable hard top with opera windows and a manually operated cloth convertible top. The detachable hard top was removed from the 1991 model year (which would prove to be the cars last).