[351confused]

I am trying to identify my heads for a small block ford. The heads are marked D70EDC and hace holes for emissions in the ends. The head has studs with flat shoulders. How do you identify these?

[mdvaldosta]

I know they're from 1977, that's about it. I'll see if I can find a place that deciphers the rest of it.

[5literJeff]

According to the engine specs sheet I read off the internet the first 4 numbers break down like this:

D7 means from 1977, O=Fairlane (62-68) or Torino (69-76) ?? E=Engine

DC = I have no idea what this means.

Before 1976, the heads feature larger valves than the early 289/302 and provide a simple bolt-on horsepower upgrade (again for the early 302s I dont know if this is applicable to 302 HO's).

See http://phystutor.tripod.com/stang/engines/small.html

And http://raceabilene.com/kelly/hotrod/engine.html

I am sure there are better sites out there that can tell you more or people around here who know exactly.

[1slo5.0]

What size are the head bolt holes? That is the easiest way to identify them and is about the only difference between 351W and 302 heads from the 70s. 351W uses 1/2" bolts and 302s use 7/16 bolts.