I would agree that actually building it would not be hard, they already made 4-speed Monte's and they made 454 4-speed Chevelles, but in almost 40 years not ONE documented car ever showed up. Like an LS-6 Chevelle with A/C, factory said no to certain things for inexplicable reasons. If an Exec went to the trouble of getting it built someone would know. There are lots of stories of somebody's neighbor's cousin had one, but no paper!