cam specS???

[78camaro]

ok guys, i have a cam that i picked up a while back, i was told it is a speed pro cam, but i have no way of knwoing specs or anything i wanna sell it for like 75$ but i dotn know how to advertise it without beign sure of what i have there are 2 numbers i can see

210518 this is on the end of it

1805 and cmc under it- this is on the cam itself

and help is appreciated thanks