Is this possible? I picked up a crager 4x2 for a Hemi. Its for a 392. Is there any way to make it work on a 354? I know the 392 has a 1/4" taller deck height, putting the heads farther apart at the intake mount. I just wanna know if anyone has made this setup work. Thanks, ROB
Build a 392? Seriously, never thought about it. I know you can buy spacer plates, I have some, for a 331-354 onto a 392. The Hot Heads manifold requires spacers when using on a 392. Interesting. Not enough meat on the flanges probably to mill it? Prob be out of whack somehow. Guys? Lippy
The 392 intake will work on the 354. All intakes will interchange unless you use 331-354 heads on the 392; then you need the spacers.
Correct, all the manifolds are the same width. The 392 heads have intake ports that are "longer" to make up for the additional deck height. So it's only when you use the 331-354 heads on the taller deck 392 block that you need the spacers.
The factory 392 manifolds are also the worst - the carb center section was depressed for hood clearance.
Panic said it, the 392 intake is not desirable. That's why there are spacers to put the 354 piece on the 392. No reason you can't do it, just not the best setup. Of course, the Cragar might be made different to the stocker.
You have 392 heads on a 354. there is no intake made for this application.You nead to get 331 or 354 heads.
Yup, you've got tall-deck heads on a short deck motor, no way a spacer can fix that. The only solution I can think of is that you IMMEDIATELY ship that manifold and carbs to me so I can confirm that it does fit on a 392.
Post the casting numbers of the heads so we can absolutely verify what you have. If they are cast 1731528 then you indeed have the 392 heads.
I've never really looked at a 392 head closely but is there enough meat on the intake side to mill it down to fit a std intake right?
Guess I never checked the heads. The block is a NE56. 354 Block. The heads are 1731528 castings. Assumed they were 354 heads. Guess the whole setup is junk. Cast scrap is getting pretty high. Aluminum too. Should be able to scrap it all out and go buy a SBC with the money. Thanks alot for the help!!!! ROB
come on now that would be ignorant to scrap it, sell it to someone who needs those parts scrapping it would be very selfish.
ill swap you some 354 heads for the intake, then youll be ok, well kinda, youll just have to find another intake
you need 55 331 or 56 354 heads. Not only won't a production intake fit( except twin log or a U-Fab that you actaully put together yourself), but the water crossover won't fit either.
Getting this intake was the jumpstart I needed to get going again on my coupe project. I was just using the bare block and heads to mock everything up. Wish I would have found out I had 392 heads before I built the headers. They might work yet. If they move at all it will only be 1/4". Thanks, and if you wanna trade some 354 for some 392 heads let me know!! ROB
As soon as you said it i thought it was a great idea... but the '92s look like the port is lowered instead of the having a cast-in spacer. The only way to do this that I can see is to raise the ports, fill the bottoms and relocate the 7 billion bolts that hold the intake on (big blocks have 8?...) no hope for those homeless 392 heads.....
The bad news is that 354 heads were the heads of choice when fuel racers were running old iron Chryslers. I had all kinds of 392 heads when I sold out of hemi stuff. But the only 354 heads I had I was running. But you can find something I'm sure.
Looks to me like you could mill the intake to fit the heads you have. There are tables that used to come in automotive surface grinder manuals that could give you the amount. You just use the difference in deck height. The figgure for a sbc was .125 off the intake for every .100 off the head. I'm thinking the 90 degree angle would be (difference in decks)X150% (.375) off each side of the intake. Looks like enough meat in the intake. Then you have a unique intake that you could never run on a 392. It would be a waste in my opinion.
The angle of the intake gasket face on the 331/354/392 hemi is much greater than 90 Deg.... I don't think you could mill enough off to make it work....
Yep... I see that now. My mistake. It's more like a sbc. I'm going to try to scrounge up the manual from my old mill. I may still have it around. See if there is a table I can scan. Jeff
Rob, Thanks for posting the photo, someday I hope to put my '30 roadster body on '32 rails and put a 354 Hemi in it. Looks like everythig fits nicely, did you have to cut away any of the firewall?
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