Well that was dumb...

Yup been there under the car with the 833 on my chest using a creeper. Didn’t have the car up high enough and didn’t fully disconnect the shifter linkage. Trapped and couldn’t move for an hour and a half. Finally wiggled free. Not easy on a creeper and an 833 on your chest with bound up linkage. I’m not an auto mechanic, just 19 and DUH in 1977.