They make additives to control that, Modern antifreeze will stop it too. Y blockers that had the dual quad setups in '56 and '57 E codes had the problem with the intake. The alloy and heat treat that John will use is going to be much better at resisting the corrosion than what was available 50 years ago. Have not had any problem with the aluminum Water pumps or Timing covers..........YET! Just about every car on the road  any more has aluminum and iron castings together.    

Frank/Rebop

Bristol, In ( by Elkhart) 

thats good to know maybe john could teach the japs this or maybe geelong water is too hard  our alloy heads are always causing problems one of (& this is sacralidge) our ford 6 cyl heads used to grow 1/2 an inch

moz. geelong victoria australia.

graduate 1980, bus, truck, car, hot rod, boat, submarine, hovercraft, hydrafoil, firetruck, mobile home, jet, helicopter, cruise ship, motorcycle, bicycle, santa's sleigh, clock, alloy bullbar, alloy fuel tank, lens, dr who's tardis, matter - anti matter warp drive buffer & y-block lover