I'd like to know more about the 90s magnum manifolds as well. Are you supposed to use a gasket and if so, which is the best?

Also, what is the part number on the Masta Performance dipstick?

What does everything think about these headers from Ebay?? https://www.ebay.com/itm/Long-Tube-Exhaust-Headers-Fits-Dodge-Chrysler-Plymouth-Small-Block-318-340-360/333018998049?fits=Year%3A1970%7CModel%3ACuda%7CSubmodel%3ABase%7CEngine+-+Liter_Display%3A5.6L%7CMake%3APlymouth%7CTrim%3ABase%7CEngine%3A5.6L+5572CC+340Cu.+In.+V8+GAS+OHV+Naturally+Aspirated&hash=item4d897aa521:g:PUkAAOSwUu5cP8A9

Price is cheap (most likely chinese).... has anyone tried them?