Hello, my granddad just gave me his 1966 Mustang and its a L6.. I wanted to convert it to a small block v8 but after reading about the process I decided I didn't want too. I want to maintain the L6 but I want to put some power behind it. I been looking up google for rebuild kits and other sort of performance question. Does anyone know what kind of performance mods I can get for the L6 so im not lugging around. I have found that I will be getting a header and exhaust. but other than that I really don't know what else I can do.