The truck does not stall in Park or Neutral. When I drive her and I have to stop, I put her in neutral and I brake without her stalling. She only stalls in Drive or Reverse, and only if I brake hard, and only if I moved at least a few inches. In other words, if I put her in Drive and brake hard without having moved, she does not stall. If I give just a bit of gas and move a few inches and then brake hard, she stalls. All driving, including on highway, is fine. She has power. She runs great. Light braking does not bring on the stall.

I tried raising the idle to 900 rpm. The stall remains the same. So I put it back to 500.

I have the 2 speed auto PowerGlide.

We did a check with the dwell meter, but I did not stall her during that check. I will do dwell again tomorrow and stall her and see what the meter says.

The fuel tank, fuel line, and filters are new.