I would guess they mean a hard 1st to 2nd shift?

I have a 470hp/525ft.lb. torque stroked small block with a TCI 727 with over 40,000 miles and no complaints. I think they reportedly had some quality control issues, but this is my second with no issues. Previous one had 60,000 miles. It's the 727 "Streetfighter" auto valve body. Little chirp in second at WOT. I prefer the 727 for it's beefier size despite it's increased weight, although I've heard the smaller t-flites can be built to handle high HP.