I used Aeroquip FC598-12 hose. The adapter is 3/4NPT so I used an alloy adapter from male pipe to 3/4" barb then hose clamped the line. The rad.-end uses Aeroquip pushloc -12 AN. I welded a plate to the radiator that I pre-welded 2 (-12) male AN's onto...replacing the original 1 1/2" hose barb.