GM Shift pattern
The good news is, the GM automatic shift pattern is the same (except for the number of forward gears) P R N D x x x for modern RWD automatics:
Aluminum case Powerglide
ST 300 (BOP two speed)
Turbo 200
Turbo 250, 350
Turbo 400
200-4R, 700-R4 (overdrives)
4L60-E, 4L80-E (electronic overdrives)
and others...
So, for these GM RWD transmissions, Park is where the manual shaft, as viewed from the outside, is turned clockwise to its stop. If the manual lever is pointed down (towards the pan), as it is for stock GM cable shifted automatics, then when the lever is forward all the way, then the transmission is in Park.
This also make sense, since the shift cable is mounted behind the lever, going towards the rear of the transmission, in stock applications like floor shifted Camaros, where the shift cable bracket bolts on with two pan bolts. Most aftermarket cable operated floor shifters are the same way. Remember that a cable is strongest when pulling, therefore the linkage is set up so that it pulls the lever out of Park, which takes more effort than going in to Park, especially when the vehicle is parked on a hill.
Now you can remember if you work that through your mind.
Hope this helps.
440shorty