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Six Pack Rocker Arms #1094757
10/15/11 12:25 AM 10/15/11 12:25 AM
Joined: Jul 2008
Posts: 205
Martinsville, VA
4
440child Offline OP
enthusiast
440child  Offline OP
enthusiast
4

Joined: Jul 2008
Posts: 205
Martinsville, VA
What's up, all. What I want to know is, who still sells them? TIA for any help.
Re: Six Pack Rocker Arms [Re: 440child] #1094758
10/15/11 12:39 AM 10/15/11 12:39 AM
Joined: Jul 2003
Posts: 1,107
Spring Valley ,Ca.
moparsquid Offline
super stock
moparsquid  Offline
super stock

Joined: Jul 2003
Posts: 1,107
Spring Valley ,Ca.
crane or mopar performance.

Re: Six Pack Rocker Arms [Re: moparsquid] #1094759
10/15/11 01:02 AM 10/15/11 01:02 AM
Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda Offline
master
70AARcuda  Offline
master

Joined: Jan 2003
Posts: 9,826
las vegas
340 6 pac rockers?

only new ones are Harland Sharp...

Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
Re: Six Pack Rocker Arms [Re: 70AARcuda] #1094760
10/15/11 01:08 AM 10/15/11 01:08 AM
Joined: Jul 2008
Posts: 205
Martinsville, VA
4
440child Offline OP
enthusiast
440child  Offline OP
enthusiast
4

Joined: Jul 2008
Posts: 205
Martinsville, VA
Quote:

340 6 pac rockers?

only new ones are Harland Sharp...





Sorry, I forgot to say I want them for a 440.
Re: Six Pack Rocker Arms [Re: 440child] #1094761
10/15/11 01:13 AM 10/15/11 01:13 AM
Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda Offline
master
70AARcuda  Offline
master

Joined: Jan 2003
Posts: 9,826
las vegas
never knew that the 440 6 pac used anything but stock rockers from the factory....

Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
Re: Six Pack Rocker Arms [Re: 70AARcuda] #1094762
10/15/11 01:41 AM 10/15/11 01:41 AM
Joined: Jul 2008
Posts: 205
Martinsville, VA
4
440child Offline OP
enthusiast
440child  Offline OP
enthusiast
4

Joined: Jul 2008
Posts: 205
Martinsville, VA
Quote:

never knew that the 440 6 pac used anything but stock rockers from the factory....



I don't know, I just remember that Hughes Engines used to sell a heavy duty version of the stock rockers and they were listed as six pack rockers, IIRC. What I'm really looking for is a rocker arm that'll handle around a .550 lift cam & still fit under a stock valve cover.
Re: Six Pack Rocker Arms [Re: 440child] #1094763
10/15/11 01:49 AM 10/15/11 01:49 AM
Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda Offline
master
70AARcuda  Offline
master

Joined: Jan 2003
Posts: 9,826
las vegas

Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
Re: Six Pack Rocker Arms [Re: 70AARcuda] #1094764
10/15/11 02:12 AM 10/15/11 02:12 AM
Joined: Jul 2008
Posts: 205
Martinsville, VA
4
440child Offline OP
enthusiast
440child  Offline OP
enthusiast
4

Joined: Jul 2008
Posts: 205
Martinsville, VA

Re: Six Pack Rocker Arms [Re: 440child] #1094765
10/15/11 08:27 AM 10/15/11 08:27 AM
Joined: Jan 2007
Posts: 7,664
IN
A
ahy Offline
master
ahy  Offline
master
A

Joined: Jan 2007
Posts: 7,664
IN
Quote:

Quote:

never knew that the 440 6 pac used anything but stock rockers from the factory....



I don't know, I just remember that Hughes Engines used to sell a heavy duty version of the stock rockers and they were listed as six pack rockers, IIRC. What I'm really looking for is a rocker arm that'll handle around a .550 lift cam & still fit under a stock valve cover.



Sometime in the late 60's the stamped rocker got re-inforced at the tip to make the "6 pack" rocker.

Since then Chrysler and the aftermarket standarized on the heavy duty design. Any new replacement stamped rocker should be the "6 pack" design.
Re: Six Pack Rocker Arms [Re: ahy] #1094766
10/15/11 12:00 PM 10/15/11 12:00 PM
Joined: Jan 2003
Posts: 75,005
U.S.S.A.
JohnRR Offline
I Win
JohnRR  Offline
I Win

Joined: Jan 2003
Posts: 75,005
U.S.S.A.
Quote:

Quote:

Quote:

never knew that the 440 6 pac used anything but stock rockers from the factory....



I don't know, I just remember that Hughes Engines used to sell a heavy duty version of the stock rockers and they were listed as six pack rockers, IIRC. What I'm really looking for is a rocker arm that'll handle around a .550 lift cam & still fit under a stock valve cover.



Sometime in the late 60's the stamped rocker got re-inforced at the tip to make the "6 pack" rocker.

Since then Chrysler and the aftermarket standarized on the heavy duty design. Any new replacement stamped rocker should be the "6 pack" design.



I bought a set of the MP rockers ,though I didn't compare them to a stock rocker, I don't think they looked any different than the rockers I took out of a 73 440 I disassembled. Maybe someone could weigh a stock run of the mill rocker and one of these to see the difference ?
Re: Six Pack Rocker Arms [Re: JohnRR] #1094767
10/15/11 02:28 PM 10/15/11 02:28 PM
Joined: Jul 2008
Posts: 205
Martinsville, VA
4
440child Offline OP
enthusiast
440child  Offline OP
enthusiast
4

Joined: Jul 2008
Posts: 205
Martinsville, VA
Quote:

Quote:

Quote:

Quote:

never knew that the 440 6 pac used anything but stock rockers from the factory....



I don't know, I just remember that Hughes Engines used to sell a heavy duty version of the stock rockers and they were listed as six pack rockers, IIRC. What I'm really looking for is a rocker arm that'll handle around a .550 lift cam & still fit under a stock valve cover.



Sometime in the late 60's the stamped rocker got re-inforced at the tip to make the "6 pack" rocker.

Since then Chrysler and the aftermarket standarized on the heavy duty design. Any new replacement stamped rocker should be the "6 pack" design.



I bought a set of the MP rockers ,though I didn't compare them to a stock rocker, I don't think they looked any different than the rockers I took out of a 73 440 I disassembled. Maybe someone could weigh a stock run of the mill rocker and one of these to see the difference ?



That would be nice if someone just happenned to have them to compare. Not to change the thread, but I plan to use these w/ a hydraulic roller in the .550ish range. Does anyone see a problem with this? Thanks for all the replies so far.
Re: Six Pack Rocker Arms [Re: 440child] #1094768
10/15/11 03:38 PM 10/15/11 03:38 PM
Joined: Jan 2003
Posts: 75,005
U.S.S.A.
JohnRR Offline
I Win
JohnRR  Offline
I Win

Joined: Jan 2003
Posts: 75,005
U.S.S.A.
That's a lot of lift for stock rockers , I wouldn't do it after seeing them first hand, they have a ton of side clearance as delivered , the set I used was anywhere from .015 to .050 ... yes .050 ... incredibly noisy to me ...
Re: Six Pack Rocker Arms [Re: 440child] #1094769
10/15/11 04:47 PM 10/15/11 04:47 PM
Joined: Aug 2003
Posts: 43,163
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,163
Bend,OR USA
Since your buying a good cam and lifters why not buy a decent set of adjustable rocker arms so you can get the best performance out of your cam Any time you replace the stock cam with one with more lift you change the distant from the end of the stock rocker arm to the cup in the lifter, which makes the stock stuff not fit properly anymore Buy the good stuff, rockers, and pushrods

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Six Pack Rocker Arms [Re: Cab_Burge] #1094770
10/15/11 05:12 PM 10/15/11 05:12 PM
Joined: Jun 2005
Posts: 4,041
michigan woods
imfixinmopars426 Offline
master
imfixinmopars426  Offline
master

Joined: Jun 2005
Posts: 4,041
michigan woods
i though i remember e-berg of a mopar mag in tech section,doing a measurement of new hd vs mid 70's rockers in the pushrod area,and others,and they were all the same?
Re: Six Pack Rocker Arms [Re: imfixinmopars426] #1094771
10/15/11 05:21 PM 10/15/11 05:21 PM
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo Offline
Too Many Posts
DaytonaTurbo  Offline
Too Many Posts

Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
To get a roller cam to work with stock rockers, you're going to need custom length pushrods. Why not go with adjustable rockers while you're at it? If you were just going to run a hydraulic flat tappet cam, then I would have suggested to just run the stock type rockers.
Re: Six Pack Rocker Arms [Re: 440child] #1094772
10/15/11 09:04 PM 10/15/11 09:04 PM
Joined: Jan 2007
Posts: 7,664
IN
A
ahy Offline
master
ahy  Offline
master
A

Joined: Jan 2007
Posts: 7,664
IN
The spring load required for .55 lift will likely push a pushrod through the stamped rocker. Over about .5 lift, the OE stamped get real risky. You need a better rocker.
Re: Six Pack Rocker Arms [Re: ahy] #1094773
10/15/11 10:16 PM 10/15/11 10:16 PM
Joined: May 2004
Posts: 5,123
Warrenton, VA
RoadRunnerJD Offline
master
RoadRunnerJD  Offline
master

Joined: May 2004
Posts: 5,123
Warrenton, VA
Quote:

The spring load required for .55 lift will likely push a pushrod through the stamped rocker. Over about .5 lift, the OE stamped get real risky. You need a better rocker.


you need adjustable rockers or a can with less lift and duration.
Re: Six Pack Rocker Arms [Re: ahy] #1094774
10/15/11 10:18 PM 10/15/11 10:18 PM
Joined: Jul 2008
Posts: 205
Martinsville, VA
4
440child Offline OP
enthusiast
440child  Offline OP
enthusiast
4

Joined: Jul 2008
Posts: 205
Martinsville, VA
You guys are right on the reliability issues, it was kinda wishful thinking on my part. I wanted to run the A&A Transmissions' 440 crossram setup, but they said it would only work w/ stock valve covers. The stock-type rockers were the only ones that I knew of that would work. Anybody know of any other rocker that work in this case? Again, thanks to all for y'alls input.

Last edited by 440child; 10/15/11 10:34 PM.
Re: Six Pack Rocker Arms [Re: 440child] #1094775
10/15/11 10:31 PM 10/15/11 10:31 PM
Joined: Jan 2003
Posts: 2,936
Richmond, VA
VT_Dart Offline
master
VT_Dart  Offline
master

Joined: Jan 2003
Posts: 2,936
Richmond, VA
Quote:

You guys are right on the reliability issues, it was kinda wishful thinking on my part. I wanted to run the A&A Transmissions' 440 crossram setup, but they said it would only work w/ stock valve covers. The stock-type rockers were the only ones that I knew of that would work. Anybody know of any other rocker that work in this case? Aain, thanks to all for y'alls input.



I ran 440 Source rockers under a stock cover so I imagine most of the aluminum rollers would work. I did have to modify them, but it was easy. I cut the baffles out of the cover, moved the baffles up as tight as I could then tacked them back into place. Gave me enough clearance to easily run them without issues.

Darrah Heath
Re: Six Pack Rocker Arms [Re: 440child] #1094776
10/15/11 11:34 PM 10/15/11 11:34 PM
Joined: Jan 2003
Posts: 75,005
U.S.S.A.
JohnRR Offline
I Win
JohnRR  Offline
I Win

Joined: Jan 2003
Posts: 75,005
U.S.S.A.
A set of crane ductiles would work with only minimal clearancing for the rockers needed .

What heads are you going to run ?
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