edelbrock nhra head

picked up a set of edelbrock 60917 nhra s/ss heads anybody done anything with them, mill, check cc's etc

I’ve never had any in my hands, but my understanding is it’s quite a bit of work to make them “legal”.

Ports are too big, guides are the wrong diameter, etc.

part number is approved by nhra with a hp/weight factor penalty

It still has to comply with all the same measurements as the OE heads.

Chamber volume, runner volumes, valve stem diameters, valve head diameters.

Some folks are using OE parts rather than carry the weight penalty. That late model combo should not be a problem finding usable iron heads.

Go to the races and make friends, ask questions. Plenty of BB Mopar class guys in D1.

Here ya go:

yep, familiar with nhraracer.com,right now running in super/street to shake down chassis, with 383, no fuel check or scales, got them cheap, not sure what I'll use, have a couple of sets of 452's, pistons came in today, most likely next season, maybe t/tune November, shop said it would be nice to have a new head with the valves nice and high

I’d suggest getting the runner volumes checked before going too far.
They’re likely already larger than the limit.

My understanding is the valve guides are 11/32” instead of the required 3/8”.
That’s easy enough to measure.

From what I saw they’re made like the 64-66 head (closed chamber small ex valve) and after they’re made the same as the later head you still lose compression because they’re aluminum. The advantage is you’re able to move stuff around a little for better flow. But $$$ better left for the big dogs imo.

The last write-ups or videos I've seen on a couple of BBM Stockers showed OEM iron heads. Anybody know of any using the Edelbrock NHRA head?

I don’t know if he’s currently using them, but I’m pretty sure Larry Hill runs/ran them in his 440-6 70 Cuda.

I also think Doug Duell used them in his 69 cuda(no hp penalty with them on that combo).

Jim Hale did on his 66 383 Belvedere wagon, record holder

OK, so they are being used by some people. Thx

I'd talk to Don Little or Steve Wann in Modesto, CA. That would be a good place to start for info.

It would def be interesting to hear their thoughts on the NHRA Mopar Ede heads........to be used in stock.

going to be interesting to see what valve sizes are in them, instructions say 2.14/1.81 states 60917 is nhra legal version of 60919

I’d be interested in seeing pics of what you have.

My old catalog shows them sold as bare heads only.

In the instruction sheet:


As I mentioned previously....... get out the burette.
The max legal runner volume for them is 203/64.

Found this earlier on ClassRacer: https://classracer.com/classforum/showthread.php?t=82319

Looks like if the OP decides he doesn't want them after all, he should contact Larry Hill since LH posted he's looking for a set at the end of that thread.

Here you go.
https://www.jegs.com/i/Edelbrock/350/60917/10002/-1
Looks like a bare 60929 with nice NHRA logo added on

Yeah, about that...

" Free Shipping - Estimated to ship direct from manufacturer on 07/28/24 , pending manufacturer availability."

Does Edelbrock have any?

In a different thread on classracer Larry Hill mentioned.......”they’re a lot of work”.

"Valve Sizes Int./Exh.: 2.25 / 2.00"

Would these sizes be correct for this Edelbrock unicorn head?

The head comes bare.

Those are the sizes of the seat inserts.

It isn’t really a “unicorn” head.

It’s the same casting as a regular RPM head.
It has unfinished valve seats and the cnc’d port openings are omitted.
They are straight plug, and it gets the NHRA logo machined into the ends.

It’s up to the end user to make sure it meets all the pertinent criteria to make it suitable for use in the class it’ll be run in..... stock or SS.

If they were a simple “bolt on and go” deal in stock.......... everyone would be running them.

Some assembly required.. From the guys I talked to who run stockers it is more beneficial to replace the 64-66 915 head than the later 906 head since the 906 is vastly improved over the early head (they have a secret way to fix the aluminum head). Also there’s so many later heads-cars out there that NHRA has a better handle on their HP than the early low performance engines. The racers are always looking for the killer combo but eventually NHRA catches up.
What there really looking for is a iron 452 BRAND NEW casting identical to the original to just do a valve job and run them.