Upgrade to aluminum/plastic master cylinder

[Pyrotechnic]

The cast iron master cylinder on my truck keeps leaking all the fluid out. The gasket is in good shape but the machined sealing surface keeps rusting for some reason.

Will the plastic/aluminum master cylinder from an 80's truck bolt in place and do the lines have the same thread? I think these look a little better and I always hated how even the littlest spill ate the paint off the cast iron one.