Hey everyone I have a 69 Mach 1 and I just wanted to tell everyone what I just did to it, lets start at the rear, replaced rear springs lowered 1 inch (Eaton springs), replaced front springs lowered 1 inch, replaced stock intake with weiand 351w stealth intake, topped that off with holly 600 cfm carb, feed into the stang a crower hydraulic cam with hydraulic lifters, the restrictive exhaust has been replaced to a 70 style two muffler exhaust with Ravin mufflers (ya something other than flowmasters!!!), oh and how could I forget stock exhaust manifolds replaced by hedman long tubed headers, so whatcha think????