well if it destroyed the shaft on the crank w/ the insert slot for the key way, then your fucked, if you cant get that key way in there correctly you wont be able to keep keep the pulley from destroying itself again and or be able to get the car at TDC reffering to the marks, that key way lines up with the crank pulley which in turns lines up with timing marks. if you cant get that to line up properly and the crank pulley to seat correctly then your kinda screwed but if you can get it to seat you can always fucke with it until timing gets correct.....if the insert for the key way is still there and useable, you might be able to put a key way in there and be ok, but the pulley might not seat correctly because of the lack of circumfrence on the crankshaft. if it hasnt ate through the crankshaft seal on the oil pump then i would try it and see how it works out.