anybody know who does the casting for these heads for holley. a guy on corral said that brodix has done the latest castings but how about 5-10 years ago? im trying to find out for my buddy what kind of heads he actually has
The older holley heads are not as good as the new brodix casting. I want to say they had valve guide wear problems. The newer heads flow fairly well and can make a strong combo.
The old Ped mount heads were Brodix castings, then AFR had a hand in some of the newer models before Holley took it inside.
Does the head have a seperate hole for the smog on the rear/front of the head or is it through the bolt hole like a stock head? This is the easiest way to tell.. Are the ped or stud mount?