Topic: 289 hipo head information

[priceless]

Do all 289 hipo heads have screw in studs?  And do all 289 hipo heads have a 19 cast into the head near bottom corner of head and visible with valve cover on?  Do they have other numbers like a 21, 22?
What does the 289 with two dots represent?

Any help appreciated.

[CharlesTurner]

289 with 2 dots casting is a hi-po head.  I couldn't say absolutely for sure on screw in studs, but that would be to account for some one-off race cars or something like that.  K codes were the only Mustangs off the regular assembly line with double dot castings on the heads and screw-in studs.

[priceless]

Would a C3OE-B, E, and F, not be a 289 hipo? 

And does the hipo head have the "19" always?  Do the C7 hipo heads have 19, 21 numbers and also do they have the 2 dot?

Gets confusing. The reason I'm asking a friend lead me to a gentleman that has a bunch of heads thats been lying around inside a shed. I've not been able to get over there yet. He is wanting to sell them and says a lot of the heads are Ford and he remembers C3OE marking and also has some C8AE markings. He mentioned several more but the C3OE got my attention.   

[jwc66k]

Do all 289 hipo heads have screw in studs? 

Yes.

And do all 289 hipo heads have a 19 cast into the head near bottom corner of head and visible with valve cover on?  Do they have other numbers like a 21, 22?

That's the mold number and 19, 20 and 21 were used.

What does the 289 with two dots represent?

It's an additional identifier. The casting part numbers are C4OE-B, C5OE-A and C7ZE-A. The last was the smog head. For some reason the service heads, C8ZE-B did not have casting numbers, 19, 20 and 21.
Per Mannel and Gregory.
Jim

[sgl66]

Hipo heads also had pockets cast around the base of the spring and narrow slots for the push rods therefore not requiring guideplates.

I know guys who have added screw in studs to regular heads so don't recommend that as a 100% confirmation...it is really hard to add metal to castings so would focus on that instead 

[J_Speegle]

...........I know guys who have added screw in studs to regular heads so don't recommend that as a 100% confirmation...it is really hard to add metal to castings so would focus on that instead 

+1 plenty of times

Go with the 19-21 when the valve covers are on - with them off casting features IMHO