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The crankshaft front housing has a raised line and aligns with notch on sprocket backing plate.
The intake manifold side sprocket (passenger side) the "I" with the notch is up.
The exhaust manifold side sprocket (drivers side) the "E" with the notch is up.
Hope this answers your question and you accept. Get back to me if necc.
The "E" and the "I" should be 180 degrees apart. Make sure the I you see isn't just a notch. There is a third notch without the E and I but you don't need it. Look closely.
I can't believe your still working on this.
Have the camshaft dowel pins facing at the 12 0'clock position on the engine then
Install the camshaft pulleys on the camshafts with the dowel pins fit into the hole at the I mark(intake side) and E mark(exhaust side).
Thank you for the accept.
Just one more note so you don't mix up the cam shafts. The exhaust camshaft has a steel dowel pin at the rear for the camshaft position sensor.