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Steve Stasko · 09-05-2019, 03:30 PM

2531110-M2 is the only accepted 426 Hemi aluminum replacement head. That is a Chrysler #, the newer Edelbrock forgings are better than the older ones. They have been out for about 7-8 years now. It's a pretty good head out of the box flow wise. You'll lose a few HP over the iron heads, but it gets some free weight off the nose of the car.

Interestingly enough, Dwight's site is showing that in Stock, the 426 Aluminum head combo is rated lower (434 vs. 449) than the steel head combo. I know in S/S, the aluminum head carried a penalty when they initially approved them. I didn't realize that they had been accepted for Stock also.

As far as the crank, any "steel" crank is allowed, factory or aftermarket 4340. No billet, Top Fuel, or other misc stuff like that of course.

My personal opinion, since the car is already set up for it, is to leave the 440-6. You have to carry a few hundred extra lbs. in B with the Hemi, a little less with the Aluminum head...for now.

09-05-2019, 03:30 PM	#3
Steve Stasko Member Join Date: Jul 2011 Location: Western PA Posts: 455 Likes: 13 Liked 274 Times in 143 Posts	Re: Stock eliminator questions 2531110-M2 is the only accepted 426 Hemi aluminum replacement head. That is a Chrysler #, the newer Edelbrock forgings are better than the older ones. They have been out for about 7-8 years now. It's a pretty good head out of the box flow wise. You'll lose a few HP over the iron heads, but it gets some free weight off the nose of the car. Interestingly enough, Dwight's site is showing that in Stock, the 426 Aluminum head combo is rated lower (434 vs. 449) than the steel head combo. I know in S/S, the aluminum head carried a penalty when they initially approved them. I didn't realize that they had been accepted for Stock also. As far as the crank, any "steel" crank is allowed, factory or aftermarket 4340. No billet, Top Fuel, or other misc stuff like that of course. My personal opinion, since the car is already set up for it, is to leave the 440-6. You have to carry a few hundred extra lbs. in B with the Hemi, a little less with the Aluminum head...for now.