i am doing my first cam swap on a 98 formula. i bought the cam from someone and he told me it was a gm performance hotcam. i just wanted to know the specs of it because i checked it with a micrometer and it turned out to be .270 and i know that is not right but i realized with rockers it can make the same cam lift more or less. i just want to know what it would lift with the stock 1.7 rockers on the heads. i know there is a site to go to so i can figure out what the specs are by typing in the numbers but i can find any, and i have been to almost all of the gm sites.
the part number is:
1721
S 12
1113

There is also a F 3 stamped on the cam next to the number.
Also is there any other mods i have to do?
thanks for the help.