NOS PONTIAC V-8 WATER PUMP DIVIDER SET GM-ORIGINAL # 9793131 THIS IS THE 2 PCS. METAL PLATE STYLE.  USED ON MANY V-8 APLICATIONS FROM 60S TO 70S.   I BELIEVE THE EARLIER YEARS USED A CAST ALUM. STYLE   I COULD NOT FIND MUCH MORE INFO ON THIS PART NO.