Hi, Being a former Chevy guy (and I mean FORMER) I'm kind of new to the Cougar family. I recently purchased a mint 71 Cougar with a 351C/2V and wanted to do a few simple mods to the engine. Headers, a 4V and dual exhaust is all I'm looking at but I hear that the heads have to be changed for a 4V. Is this true? Since it's a little underpowered as is, can I get the needed horsepower increase by just using the 2V heads and changing to an Edelbrook intake and carb, adding the headers and duals? Also, if anyone can help on where to get a decent pair of headers that will fit let me know. I'm in Tampa Florida. Any help would be appreciated.