Did you ever get it going? The markings arent on the pulley, theyre on the balancer behind the pulley. Check right infront of the crankshaft. I dont think your timing is off though. By, "pushing one of the cylinder heads down" do you mean your buddy turned the engine over, moving the pistons around? That wont mess your timing up. If you never removed the cam and/ or chain, it should still be fine.
-Thats what your looking for
-If your timing really is off, I think this is what youll have to do