I bought a 92 350tpi and rebuilt it. I swapped the cam that it had for the lt1 cam. Now I am curious as to what my old camshaft is. It is a hydraulic roller and has number stamped on the very back of it exactly like this 1098
2714B
Also on the rear away from the other numbers 808 is stamped. Between the distributor gear and the rear journal 2714B is stamped and so is what looks like IK0007 or may be JK0007. Behind the fuel pump lobe and the first lobe there what seems to look like some yellow paint marking. It may be the original cam but I am not sure. All I do know is the engine has been rebuilt before so it may be aftermarket of some sort. Thanks

 

Not sure about the #'s on the end of the camshaft, but the stock roller cam out of my 91' had 808 in the same place. And there wasn't anything stamped on the back of it, it was just smooth.

HTH

FWIW - look at the lobes, if the peak of them is fairly narrow - my bet is that it's a stock GM camshaft.