Hello! I am the current owner of a 1979 Bronco it has the 351m with the c6 transmission, my truck was sitting for 10 years before I acquired it from my dad and begun restoration, before it sat it was equipped with a dual plane edelbrock intake, and an edelbrock 1406 carb, I've always had an...

I put a new Holley on my mild 351w and it would leak and idle higher and higher as the choke opened but ran very rich to where black smoke was puking out the exhaust so I took it back and got an edelbrock and it also idles high as the choke opens but not as high as the Holley. Could it be the...