Roofus, do you know of some place where old farmers or grain farms may have a BIG truck with your size engine in it? The ones I have (283 ramhorns) supposedly came off a bigger truck. The guy I got them from shjowed me a tab that is on my right header that was on the big trucks to hold an oil cooler. So, don't over look big trucks....and yes, I love the ram horns on my small block in my panel.