Hello!

I have just found out that my master cylinder is leaking at the cap. The casket is probably old. But I don't have the original master cylinder to Chevelle 72 this one is different. So can any one identify this one, make and year? So I can order a new gasket. It is square at the top and round in the bottom. Check the picture. Hope some know. Thanks.

http://www.dvdforum.nu/images/galleri/2/2059/002059CRU61P5ZJN3XQCLZ92UB2AE7.jpg

Okej guys
Took one more picture of the cap yesterday. Now from abow. Has anyone see this shape of the cap before and know something about it?

http://www.dvdforum.nu/images/galleri/2/2059/002059Y4A8MLIU8S9VQ1LUX8VNVIQ3.jpg