[jhv48]

I had to fabricate metal heat shields with reflective heat tape on one side to shield my hydraulic lines from the heat of the headers. Actually wrapped the last foot to the slave in a high temp sleeve.

You might have to do the same. A few pieces of sheet metal from Home Depot and a Dremmel with a cutting wheel can make great heat shields when covered with reflective heat tape on one side to reflect the radiant heat away from the hydraulics.

You might have to replace the m/c just because the heat has partially destroyed the rubber seals. Don't replace the master till you reduce the heat first, or you'll kill the new one too.