What year did mopar change the timing mark indicator from the passenger side of the front cover, to the driver side ? I cant remember.

I am almost sure in 1970 when they went to the aluminum water pump is when they changed.
69 still had the cast iron water pump and timing marks on the passenger side if I am remembering correctly.
Matt

Thank you. I think you are right. I couldnt remember whether it was 1970, or 71, when they changed to the aluminum water pump.

OT FYI either pump will fit either timing cover, mainly done to use a pump with its nipple on the same side as a different radiator then remark the dampener. Actually You can keep the hose and t cover/dampener timing marks on the same side you just have to aim the light just right but it is easier to just remark the dampener on the other side but there is a early 273 V8 bolt on timing tab out there that puts the marks on the pass side (like the cast in marks on the early t cover) if using the early pump and the later t cover. EDIT The early cast pump is much thinner which will require a different pulley