In principle it is possible, but the permanganate treatment required to prepare the tissue to Fluoro Jade B staining can reduce the Ab staining, so normally you have to use very good Abs to co-label (GFAP, Neurogranin, NeuN should work, there are many that give very strong staining).
Of course you should use secondaries conjugated with dyes in the red region of the spectrum (Alexa555, Atto543, Alexa594, CF633, etc.) or the UV region of the spectrum (Alexa 350)... It is not very clear how wide is the excitation spectrum of the Jade B dye, so I would not dare using the region above 400 nm... but maybe somebody has better experience...
To adress a point in Pietro Pilo Boyl's answer: you can perform a lambda scan on your confocal microscope to know the emission range of the Fluoro Jade. The lambda scan would scan using the same laser line but changing the emission range. Try different laser lines and see which works best. I don't believe there is literature published about the spectral qualities of Fluoro Jade.
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