Hi all,

I've gotten a pair of 16 plug D5 Hemi heads, and was wondering if a normal rocker arm set (rockers, shafts, mounts and adjusters) would work with it.

I've done some reading, and got some mixed answers, so I've decided to ask it here.

thanks a lot

No D-5 heads take unique rockers.

This is what they look like. Notice how the exhaust is very long. And they use their own aluminum stands.

Bear in mind that D-5's also take a different block (the pushrods come in a little different) as well as different pistons (because of the shallow chamber), pushrods (longer), plug tubes (longer), intake manifold (round ports), headers (round ports as well as a different pattern), valve covers and intake/exhaust/head gaskets. And it may not fit in your car because it's wider. I love them but if you are wanting to get one of those running you are a better man than me.

Hemi Fred had some D-5 parts years ago. I think he sold it all. I don't think he had the block for them. I've heard that some guys modified a KB aluminum block for the revised push rod holes.

The D5 head was developed by (oops,it was Weslake) for racing. When it first came out it was a dog. They didn't win races. People who could have gotten them for free, used a different head. I remember the talk back in the day..

I read somewhere that they came back much, much later because they could be wildly ported. The ports looked way different from stock D5 ports.

I am guessing here, but I think the D5 head basically doubles the cost of building a Hemi.

As one of the limiting factors of this head is the small, high velocity ports, it'd probably work better in a street application. Again, cost and room are going to dictate triumph or failure. I hope you didn't pay too much for them.

R.

As mentioned the Harry Weslake designed D5 head require the special D5 block (and pistons) to work. See attached pictures. Block casting no is 3577430 so start looking. They are often confused with the iron "fuel" block so try both search words when looking on ebay, I have seen several there.
Some links with more pics:
https://board.moparts.org/ubbthreads/ubbthreads.php/topics/1268982/1.html
https://books.google.se/books?id=I3WoCgA...p;q&f=false

Pics on complete engine, pistons and headers.

Does anyone know the Chrysler part number for the D5 pistons? I have a set of NOS pistons that are supposedly for a D5 with 3614 417 ink stamped on them. Have never been able to find that number listed anywhere or a number for D5 pistons either

Not to hijack the thread but can anyone give me the specifics on the D6 head?

Old DC handbook says "D4 intake ports and a new raised exhaust port". Dual plugs, cast no 36144885. Not to be confused with the ported D4A head with cast no 3614433. Have a couple of pics.

I don't think I have the part number but you can cc the dome of the piston. It will be very different. A D5 is around a 100cc chamber vs 172cc or so for a normal Hemi.

As stated above, it's basically a D4 done in aluminum with 16 plugs.

The "D4A" wasn't a real head. It was a nickname for a head. It is a 433 head, aka "twin plug" head, aka "replacement head" ported by Mullins to D4/D6 ports. Most everyone in the mid 70's used that head. Pro Stock, boats, Garlits. Maximum performance hemi head of the time.

Thanks for the info guys. Does this head take the standard rocker gear, etc? Can it but used easily on a street car? A friend of mine has an unused pair.

Yes, the D6 uses standard rockers, pistons etc. But it's a challenge today to get anybody to make off the shelf headers. (Beg TTI maybe they will give in, they didn't for me.) You may have to make your own. Mopar used to offer intake and exhaust gaskets. Most people that port heads today are probably taking the intake port to a D6 size so intake gaskets shouldn't be hard. I have some exhaust gaskets that you could use as a template if you can't find any. The only other problem I see is back then people told me they were porous. I never ran any personally, so I don't know. You may have to put some ceramic sealer in them. But I think that is possible today. The D6 is certainly a good looking exhaust port.

The D6s are kind of a crapshoot as far as porosity, have had some that were perfect and others that had small holes and pock marks all over the chambers and deck. And those are just the areas that are easy to see. They are a really nice, good flowing head when they are right, but a real headache if you get a leaker

Thanks, will check the dome

It sounds fun running D6's and stuff but I imagine Edelbrocks make more power and are so easy and so cheap.

Unless you already have the old heads, I agree you would be ahead of the game buying new Edelbrock or Stage 5. Sellers of the old heads (D4, D6, 433s, etc)still want premium money for them and you don't know what kind of issues they carry with them.

Guys

As there seems to be a few people with info on older part numbers.
Can I switch gears here and ask what head carry's the casting number 3512105X
Dec 69 cast dates?

Thanks

Mike