But you described a power glide above with L and D

don't you have a phone to fix?

Nobody uses them any more LOL

that;s cause they're waiting for the repairman to show up

On my automatic trucks of that vintage I like to pull the part throttle kickdown valve body add on thingy off and throw it in the trash and put a block off plate on the VB. It only changes 1-2 and 2-3 shifts but it helps reduce the number of shifts at lower speeds. If you don't throw it in the trash you can use it on older cars with big cams to help keep them in their usefull power band.

Another thing I like to do is block the OD acumulator in the VB, the spring is usually broken anyhow, just pull the piston (no VB removal needed) throw away the spring and fashion a blocker from a wooden dowl to keep the piston from moving at all when the cover plate is added back.

It idles fine after the computer learns it. At first it would die and not idle properly but it learned quick. The only issue is any time the battery is disconnected or goes dead the computer has to go through the learning process again. Not a big deal at all really.