Need your help, as many of you may know, Stage 5 rockers will not fit under stock Hemi valve covers. I have read you can stack 2 sets of valve cover gaskets. I have verified that this is correct. I am purchasing .188 valve cover spacers from Mancini racing. I would like your input on the best gaskets to use on both sides of the shims. I suppose I feel better about having a shim in between two gaskets, like a windage tray.

Thanks Bob, by the way, it is a shame to conceal such good looking rockers under the valve covers.

The best gasket I have found is a brand call Realgaskets, made here in Tennessee. They are molded silicone with a fiber glass core. I haven't noticed any leake, and they are reusable. Call 800-635-7325, and ask if they can be stacked like you were thinking. I was thinking about doing the same spacer thing with my motor, but haven't gotten around to it yet.

What are you going to do about the spark plug tube lengths?

Cab, thats a real good question!

I just went through this with my Landy rockers hitting the stock valve covers. I dimpled the valve covers where they were hitting. With the wrinkle paint, you can't even tell. That helped, but there was still a place or two that just touched.

I used the Fel Pro Performance gaskets, which are 2 rubber/cork gaskets laminated to a wire mesh. They are really thick.

Then I put a washer under the spark plugs to space the tubes up. No more rocker to valve cover contact and no other problems. Probably not a perfect fix, but it seems to work.

And I would like to try the silicone gaskets mentioned above. The rubber/cork seal good, but need several re-torques.

Thanks for the response. I considered wacking, dimpling the valve covers but decided against it. I found the valve cover spacer on Mancini's web site and decided to go that route. I would like to use the thinnest but best gasket possible. I called Mancini and the spacer cannot be used as a gasket, so it needs to be sandwiched between two gaskets. The spacer is .188 thick. Mancini sell spark plug tubes, and o rings, that are 1/2 taller than stock.
I guess the big question now is what gaskets to use????????

Thanks again Bob,

There are chrome valve covers (66-69 style) that Stage V rockers will fit under but maybe you want the as delivered look.

Thanks Rick I know that there are valve covers available that would clear the rockers but I am trying to use the original covers.
Thanks Bob

Use two gaskets and get longer tubes. I got tubes from Tim @ FHO.

That's what I did.

Lets see some pics of that hemi six-pack.
I would like to have ran a six-pack but i didn't think it would flow enough for a hemi. I have the manual six-pack setup on my 383 presently.
What do you have for clutching and trans??

Mopar had longer tubes available also, made for top fuel cars. Call a Top Fuel team, they will help. Most are super nice people. Maybe glue the Mancini spacer to head and use one gasket?
I like the mechanical 6 Pack too, just built one for my 440. I think if you calculate the airflow test pressure difference, the 6 pack is around 960 CFM? Changing the center carb from 350 CFM to a 500 CFM would help. Maybe I need one for my hemi??? Does the 6 pack work good on a short runner intake?

I am running the Stage V rockers under a set of ebag repop 68 black wrinkle valve covers with no problems with my crane solid roller cam and lifters...???

Thanks for all the input. I purchase .188 spacers from Mancini Racing and I purchased Fel-Pro 1657's, thickness .094, to install on each side of the spacer. Plenty of seams for leaks.

Thanks Guys

After reading this I ordered some of the silicone gaskets from Realgasket. Hopefully these will stop the leaks I am always chasing with my stock covers.

Be sure to follow the instructions

Lee646;

What was the problem you were having, stacked gaskets????

I was worried about stacked gaskets, so I am using a spacer, sandwiched between two gaskets, I was thinking about Real gaskets as well as Best gaskets out of Calif. Summit racing is just too easy. I thought Best Gaskets has a great head gasket.

Good luck with your leak..... both of us!!!!!!!!!!

Rattrap; Just emailed you a pic of my Hemi six pac. Hopefully one of these days it will be mounted between the frame rails. It looks so good on the engine stand I feel like it should be put in my Living Room!!!! Hope my wife doesn't see this. As far as a tran; I can't drive a big block/Hemi with an auto. I kept the Torquflite, put it on the shelf, I will be running a Tremec 5 speed, 3.54 rear gears in a 67 GTX.

Mickey has the Roadrunner

No, I dimpled my stock black wrinkle covers and even though I straightened out the rails and used the good Fel-pros, it seems like I always find a drip somewhere. These silicone ones might be just what I need.