Hi there,
thank you for the donation,
I will need to know which engine is fitted the 3 or 3.5 Liter. You are in a precarious position as any excessive pressure may bend a valve. To align all the timing marks will take great skill and a careful hand as you now have to align all the marks with out doing any damage. Did you stop when you felt the pressure or go past it? If you went past the hard point, you may of already bent a valve. I feel you should get a mechanic to look at this for you, as i don't want to see you get in to deep.
Mark (mhpautos)