Auto Zone can get me a gasket set for my 270 in 24 hours for 25% less than NAPA who want 5 to 7 business days or another $60 to have it here tomorrow. For the Fel-Pro set Rock Auto wants the same as Zone but another $40 to have it here tomorrow I haven't done this in over 35 years and I don't know what to look for anymore. Is there a quality difference? Could they be different types of gaskets?

It's important to me that I get these quickly but I don't want to sacrifice quality. thanks jerry