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All things considered. I am seriously considering going the aftermarket head route. After adding up all the cost of new valves, keepers, machine work, etc…. I feel ill easily be into the aftermarket aluminum head range. If someone was trying to build a period correct restoration, I see these...

Here they are in order. D0 head D1 head Do these pictures help? I’d like to get this head thing sorted before ordering any of the parts so I know exactly what I have.

Also, does anyone know why these heads have this spacer looking thing under the valve spring? It is not present on all locations. So I’m curious if these are shims of some sort. I believe they were under all intake springs and only about half the exhaust springs.

You are exactly correct. The D0 head has an N and the D1 head has a GA. When I look closely, I can see the chamber difference. The D0 head chamber is slightly more shallow. Almost like if you milled the deck on the D1 head making a hollower chamber. I don’t know if this difference is enough...

Oh my!! You put up a very convincing argument. Valves will be replaced for sure. Thank you for the warning.

They are definitely Orange anodizing, not red. I think it’s the light in that photo. Here’s hopefully a better picture. Even in these pictures they look slightly red. But in person they are definitely orange.

Here are the valves I pulled out. I’m guessing these are the multi groove ones you are referring to. Guess this means I need to replace the valves? Just for my knowledge, is this a requirement, or nice insurance? Reason I’m asking, is I know there are many things that are nice to do but not...

The Cleveland mine supposedly came out of was a much older build. So it is possible they used the early Harland Sharp 351C rockers. It’s also possible they used the Chevy ones. I’ve heard of that as well. That’s why I was hoping there was some way to positively identify which ones I have.

Thanks for the detailed response. The rockers did come with pushrods. But not the guide plates. I’ll research guide plates when I look for the studs as well. I’ve also heard the pushrod length may be specific to the build. Any input on that? Or are they pretty generic for all Cleveland’s with...

Also, I have a set of supposed Harland Sharp rocker arms for a 351 Cleveland. They came with some other Cleveland parts I bought. But these have no identifying marks on them. I assume they are Cleveland rockers since all the other stuff I got were for a Cleveland. But is there anyway to confirm?

Here is the information on the heads. Date codes DOAE and D1AE. Not sure if this means they are not a matched set or if Ford did use different date code heads on the same engine back then. Also an interesting rid bit of info. The D0AE head has a 4 in upper corner and no bubble. The D1AE head...

I have a completely rebuilt 351 Cleveland long block. It was a mild build to factory specs. It dynoed at a Max Horsepower of 244.3 at 4700 RPM and Max Torque of 313.5 at 3400 RPM. It was originally a mild build to go into my truck. But plans have changed and I now want it for my Mustang. There...