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JRyan · 09-18-2008, 11:03 PM

1973 4-bbl heads had the smaller valves. I just put a set on a friends '73 Mustang convertible and they were the small valve heads. I also have another set in the garage. So NO! All 4-bbl heads DO NOT contain the larger valves. All CLOSED CHAMBERED 4-bbl. heads contain the larger valves. The D3ZE-AA heads came in both large and small valve configurations and that casting # is the legal replacement head for all open chambered 4-bbl heads. Rarely, the small valve versions show up on e-bay. In fact, there is a set of '73's on e-bay right now The ad says they have the 2.19 Intakes, but it's obvious they still have the 1.66 exhaust when they are compared to the '71 large valve heads also on e-bay. The space between the valves is significantly larger on the '73 heads.

Jerry

09-18-2008, 11:03 PM	#12
JRyan Senior Member Join Date: Apr 2003 Location: Aberdeen SD Posts: 645 Likes: 30 Liked 112 Times in 31 Posts	Re: 1969 Ford Cleveland heads 1973 4-bbl heads had the smaller valves. I just put a set on a friends '73 Mustang convertible and they were the small valve heads. I also have another set in the garage. So NO! All 4-bbl heads DO NOT contain the larger valves. All CLOSED CHAMBERED 4-bbl. heads contain the larger valves. The D3ZE-AA heads came in both large and small valve configurations and that casting # is the legal replacement head for all open chambered 4-bbl heads. Rarely, the small valve versions show up on e-bay. In fact, there is a set of '73's on e-bay right now The ad says they have the 2.19 Intakes, but it's obvious they still have the 1.66 exhaust when they are compared to the '71 large valve heads also on e-bay. The space between the valves is significantly larger on the '73 heads. Jerry