Reverse flow water pump

[Jwymore]

This is my first post here and I am in the initial planning stages of a 65 Coupe purchase and build. I have heard the use of reverse flow water pumps pop up in some threads but searching around I can't seem to find anything on why and in what builds they may be required and/or what the advantage of them may be.

Right now my plan would be to do a 347 stroker motor with some version of an 8 stack intake. Since I am in Arizona I feel A/C is a must and I assume most builds are using power steering. I am looking to make a more old school looking build so would consider a v-belt system but it looks like most are going serpentine so I would be open to that as well.

Please enlighten me ...... Thanks!

[Big Blocker]

What you are referring to is the "reverse rotation" water pumps used on most serpentine belted cars. The routing of the flat belt required the belt to wrap around the water pump pulley in a way that caused a reverse rotation of the pump. FORD changed the impeller to have flow when a pump runs in a different direction then the previous rotation pumps. They are interchangeable (depending on timing chain cover) on small block FORD's - it will depend on WHAT belt system you decide on ( "V" or serpentine ) and the routing of the belt(s). "V" belts can only wrap around pullies on the outside. Serpentine belts use both sides of the belt but can be used just like a "V" belt.

FWIW, a reverse rotation pump spins in the same direction as the engine spins, counter-clockwise.

Doc

[Jwymore]

Ok, thanks! I was concerned it might be required for hose routing or other clearance issues. Sounds like it's just a matter of belt routing. Appreciate the clarification.