While I never checked it personally I was told the late model 40 series and the early 79-85 mini truck used the same front knuckles. Each had their own part number and price. Land Cruiser costing more. I do know the L brackets for the transmission crossmember member changed part numbers the same...
If the original wheel cylinders were NLA how did you decide on the ones you have? I was able to figure one of the front wheel cylinder part number. PARTSoug sounds NLA but has cheap aftermarket substitute available if you scroll down a little. I would order aftermarket verses pre 8/80 brake...
What you have is probably standard for markets that still had drum brakes on the front axle 8/80+ You rear axle should only have brake cylinder on each side.