Water pump belt idler pulley on 440 A/C car

[roger440]

Im looking to replace the idler pulley on my setup with a correct one. The car is a 69 440 Rt/SE with A/C

Thing is, having looked in the parts book, it seems to list 2 part numbers, 2004766 and 2240397.

Im confused as to which one would be correct? Ive found both for sale, but want to make sure i get the right one.

Anyone have any ideas??

[y3chargerrt]

The correct one is 2240397. It's a single pulley thats about 3 3/4" in diameter. I have an NOS one that I may let go.

[roger440]

Excellent. Am i reading the parts book incorrectly?

I may have one that i can buy, but if not i will be in touch. Though i am in the UK!