Top Quality Early Style Japanese 1600 pump. This pump fits the 65-67 3-main engine correctly:

Shaft does not protrude thru the metal 4-blade fan- no need to hack-up your OEM metal fan.

Short stud mount for early 3-main 1500 and 1600  - replace that tired cast iron pump.
 
Direct bolt on.  Engine block stud change not required which is typically a nightmare!
 
Brand new pump.   Machined for the short lower stud on 65-early 67 1500 and 1600.  Cast Impeller.   
 
 
Gaskets and Fan fasteners included.  Bypass fitting installed with this pump.
 
Careful what you buy on Ebay, there are all kinds incorrect pumps out there.  
 
Excellent quality pump, Not GMB, China or other ebay junk!