A manual choke conversion is completely reversible. You will not forget to push in the choke because you will notice the truck stumbling and sputtering and you will think "Oh, that must be the choke I forgot to push in."
Once you have the manual choke it will become second nature to pull it out before cold start up and push it in once you are underway. Our forefathers and foremothers did this for decades without negative effect.