Maybe you'd be better off with some 12v linear actuators than using those winch motors.
Neither the chute discharge angle or rotation would take much movement. With some
simple linkage or a lever and drum you get movement in whatever direction you want.
You can get linear actuators that are geared for different travel rates. Their motive force
is a function of the actuator motor size (fractional HP) and gearing. Travel rates in the
range of 2"/sec with 25# of force or 0.5"/sec. with 100# force are common, and you
can get even slower/stronger ones.
It would have been helpful to those who responded early on if they knew the application
in your first post. A photo and description of what you wanted to accomplish would have
yeilded responses that were more in line with your needs.