Superbird Crankshaft Pulley

[Arnie Cunningham]

Hey All,
I have a few questions about the crankshaft pulley on Superbirds.  We all know that all Superbirds came with Power Steering and no AC.  So, in theory, all the 440-4 and 440-6 cars should have the same two groove pulley on the crankshaft.  And, 1970 was one of the last years for the offset/non-symmetrical bolt pattern.
So, here is the issue.  I have thrown a few belts since I put my car back on the road in 06 and I want to make sure the pulleys are not the issue.
I took photos of the crank pulley from Al Wald's low mileage, relatively untouched Superbird engine.  His looks like two separate pulleys smashed together.  There is a large distinct separation between the two grooves.  Please see the first set of photos.
His pulley measures: 7 and 5/16 inches at the widest, 3 and 3/16 inches deep.
Is this what you guys with the untouched cars have?

[Arnie Cunningham]

The pulley I have been using is similar but not the same.  I has a flat surface area between the grooves with a seam.  It measures 7 inches across and is 3 and 5/16 inches deep.  Please see the second set of photos.  I am wondering if these differences explain why I had some trouble lining up the belts.

Also:  Does anyone have width and depth measurements for the water pump pulley?  Has anyone else run into the spacers behind the water pump pulley?  I found some on my 70 New Yorker.

[Arnie Cunningham]

Still looking for a photo of a known correct crank pulley.  The varieties now number 5 that I have come across (when you count the newer symmetric bolt pattern ones that I know are not correct).  Anyone have a photo of theirs or a link to a known correct car?

[arrow]

  The one piece pulleys correct , I checked both my Birds - they both have it , I know the U code car is all factory original, The two piece pulley you pictured , I think isan earlier year pulley

[Arnie Cunningham]

Excellent.  Thank You.

[RealWing]

My original V code engine has the one piece. I've attached a couple of photos. There was a "S" stamped on the back of the pulley.
Jim

[Arnie Cunningham]

Ah! More confirmation.  Thank you for posting.  I have two of the symmetric bolt pattern ones.  I will have to dig for a non-symmetric.  I think there is one around here somewhere.

[62 Max]

You can add another,mine is also one piece.

[Arnie Cunningham]

Excellent!  Thanks all.  Maybe now the pulleys will line up enough to stop throwing belts.  The one is only an 1/8 inch off but I guess that must be enough when the rpms get up there.