Found an edit for you as I’ve been updating my LA highways.
On LA 620, the first marker says LA 143 and it should be LA413.
Also, in reading this thread, I saw where you’re only putting highways that are signed. There are more spurs and highways on the official highway log, but that you’re going by ones signed in the field. There is a signed Truck LA 743 in the field. It goes westward from the junction of US 190 and LA 743 following US 190 to I-49, then following I-49 north to the next exit, exit 23, then eastward along La 744 back to LA 743. There is a large WalMart distribution center there on LA 743. And the road south along 743 to US 190 is narrow and windy.