[DeTomaso] Techno Question: AC system dryer insulation

Dear Forum, This is a trivial question about the dryer in the Pantera AC system. Is the stock factory foam insulation over the dryer necessary if converting to R134? Mine is fifty years old and ready for retirement. Must it be replaced? Curious, Chuck Engles Dear Forum, This is a trivial question about the dryer in the Pantera AC system. Is the stock factory foam insulation over the dryer necessary if converting to R134? Mine is fifty years old and ready for retirement. Must it be replaced? Curious, Chuck Engles