Help with Cam Stamped Number??????
 

I pulled my motor apart awhile ago from my 1986 5.0 EFI & now am selling the cam out of it. I always thought it was just a stock cam, the guy who wants to buy the cam asked for the stamping number on it, he said that is not a stock cam. So, here I stand with my Cam in my hand..... the stamped numbers on the end of it reads as follows:
1GI7
Can anyone recognize this number, so I can get some info for him.
Thanks
Tony