I'll look into those Falcon sites CSF, and the Kanter book, thanks for explaning everything, LT1, CSF and Viking. I think the master I got is a new universal for like a few years of Falcons/ Mustangs because there are 3 fitting spots really, 2 in the side and 1 on the bottom but, the 1 on the side in the front has a silver nipple which kind of looks like a grease fitting but it can't be I don't think and when I compared them next to eachother ( under the hood ), the lines would fit exzact on the new cyl's fitting spots just like original but, what purpose does the silver nipple serve, old cyl dosen't have 1?