426 Hemi Dual Spark Plug Aluminum Heads - ID Help

[64 Sportfury]

A retiring engine builder, former drag racer here in FL asked me about a set of dual plug aluminum 426 Hemi heads he has sitting in his shop. I was hoping someone here would be able to ID them so he can put them up for sale. They have larger valves both Int. and Ex. Int. 2.35 and Ex. 1.935. He has SS valves that fit the heads which have bronze valve guides. I forgot to check if the second set of spark plug ports are threaded. I can't tell in the photos I took either. He doesn't recall how he got them so no history there. Please see the attached photos if you can help it would be appreciated.

 

[64 Sportfury]

 

[1 Wild R/T]

Dodge Plymouth Mopar 426 Hemi Mullens Direct Connection Dual Plug Heads 3614433 | eBay

I acquired these with a bunch of 426 Hemi parts and know nothing about them other then what I see. Both have casting number 3614433, 1 head is complete the other is bare. Both show signs of repair the assembled one in the rocker arm stands. The unassembled head has epoxy to streamline the ports...

www.ebay.com

Mopar 426 HEMI Heads Aluminum 3614433 Casting 1965 SS Pro Stock 2531108 for sale online | eBay

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Not saying it is but it's possible the SM # could be Sox & Martin.. They are a fairly serious race piece...

 

[Runcharger]

I had a set of those once. Mid 70's Mopar over the counter piece as I recall. Are the exhaust ports square or D? I thought mine were D-port but I went through so many junk aluminum heads before getting smart and buying a set of Stage V's I can't remember now.

 

[64 Sportfury]

Thanks for the responses 1 Wild R/T and Runcharger. I will follow up on this info and report back. I don't have a photos of the exhaust port shape but will get a few. He is about 75 yrs. old and does/did mostly GM stuff. He's got tons of nice period engines, parts, etc. He has some serious intake manifolds that circle the upper walls of the shop as well. You both have given me good info to pass on.

 

[1 Wild R/T]

Found a little more info...

Casting number 3614433 is actually part number P3690038, it was out of production and no longer being sold by mid year 1976...

 

[1 Wild R/T]

Then there's this... Might see what he knows... @hemiman426

WTB - mullens heads 3614433 dual plug

iso mullens 3614433 426 hemi dual plug heads,pm me here

www.forbbodiesonly.com

 

[6PKRTSE]

Not sure exactly what your heads are from the pictures. I have a pair of Stage V dual plugs for my next build.