Three versions of the L brackets for the 40 series. One for short mid wheel base. One for the FJ45. Third for the HJ47. Two versions of the crossmember itself. 8/80-9/82. The 10/82+. The change in the crossmember 10/82 is for the H55F, the section for the front driveshaft is deeper for more clearance. Toyota gave the L brackets different part numbers 10/82 but they stayed the same. Have a pair front 3/82 FJ40 and 3/83 BJ42. The letters and numbers stamped into them are the same. The crossmember changed.
So searching for a 3/82 FJ40 L brackets need to be from a 8/80+ short or mid wheel base. If running a stock.four speed can be any 8/80+ crossmember from a 40 series. Switching to a H55F need the 10/82+ style. Besides the 60 series people modify there is also the pre 8/80 BJ40 version which I've never seen just know they used the crossmember.