Saw several threads on quick attach for the L3400 with LA463 FEL. Consensus is that the correct part is the L2230. I went to local Kubota dealer here in NH to order it and same issue as everyone else reported, they say the computer does not list a quick attach for the LA463. He says he has the coupler for the L3901 in stock and believes it will fit. Measuring loader arms - center to center - is exacting 40" on both my tractor and the L3901 he has on the lot. Going to reuse my bucket, have them cut off the ears and weld on the plate. anyone know if the quick attach for the L3901 will fit the LA463? thanks