Ok, this is frustrating, several times I have tried to order head gaskets from I-boats marine store. I have ordered dozens of other parts over the past couple years with no problems. When I go to internal engine parts, find head gaskets, there's a whole list of head gaskets, by part number...what if you don't have a PARTS manuel? Every other part has an application process, it's like I'm supposed to order all of them and see which ones fit...I'm sure it's just me, and there's a very simple explanation, so I (and my blood pressure) would be very grateful for some help here...Thank you