Camshaft ID
 

I got this as part of a package deal and the cam was inside of a GM 3863151 tube. Im looking to sell it, but i want to verify that it is an original cam. There are marking on the end of it that are leading me to believe it may not be. Here are the pics...

https://farm5.staticflickr.com/4848/...035f442d_z.jpgNOS Cam 2 by Casey Kloess, on Flickr

https://farm8.staticflickr.com/7856/...c7afbd4c_z.jpgNOS Cam 5 by Casey Kloess, on Flickr

I Googled Erson 990B and found this thread. Should be enough for you.

http://www.348-409.com/forum/threads...js-post-167240