I normally my Jerico 4 speed in neutral, and let the engine drop down to idle somewhat slowly. Both my Fairmont and Mustang have rear sump oilpans, so I try to avoid jamming on the brakes, causing the oil to slosh foreward, and possibly uncovering the oil pump pickup screen. Besides Mission and Pacific (Seattle) both have long shut down sections, so no need to brake really hard. Bremertons much shorter, I have shut the engine off after kicking the trans in neutral if heavy braking was needed. I would never leave the car in gear and let the engine slow down the car, I doubt the connecting rods would like that very much.