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rocker arms on 360 with 340 x heads??? #928264
02/13/11 11:14 PM
02/13/11 11:14 PM
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superstreet1896 Offline OP
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I have this set set up for ten years never had a problem but while adjusting valves today i noticed that on one of the rockers that the pin that goes through the roller part on the rocker arm has a lot of play in it. i bought these heads complete and have not touched them. its a 360 block with 340 X heads, its a flat tappet cam. Does anyone recognize these rocker arms so i can replace the bad one. any help would be great. Thank you

Re: rocker arms on 360 with 340 x heads??? [Re: superstreet1896] #928265
02/13/11 11:21 PM
02/13/11 11:21 PM
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ahy Offline
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Best guess its aftermarket. I don't believe any muscle car factory offering had roller tips. A pic would help a lot.

Re: rocker arms on 360 with 340 x heads??? [Re: ahy] #928266
02/13/11 11:28 PM
02/13/11 11:28 PM
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superstreet1896 Offline OP
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i have 3 pics but i cant post them , im new to this forum and i guess the pics are to big. ill try to figure out how to post the pics

6474568-087.JPG (101 downloads)
Re: rocker arms on 360 with 340 x heads??? [Re: superstreet1896] #928267
02/13/11 11:35 PM
02/13/11 11:35 PM
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superstreet1896 Offline OP
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another pic

6474588-086.JPG (84 downloads)
Re: rocker arms on 360 with 340 x heads??? [Re: superstreet1896] #928268
02/13/11 11:40 PM
02/13/11 11:40 PM
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oberlin, Ohio
Rapid340 Offline
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Those look like comp SB magnum rocker arms. The ones they sold a few years ago, not their current offering.


1971 Factory Appearing Duster 340 11.000 @ 122 mph
Re: rocker arms on 360 with 340 x heads??? [Re: Rapid340] #928269
02/13/11 11:44 PM
02/13/11 11:44 PM
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superstreet1896 Offline OP
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its not a magnnum motor but i guess those could be them, they are about 10 years old id guess the heads were put together in mid 90's

Re: rocker arms on 360 with 340 x heads??? [Re: superstreet1896] #928270
02/13/11 11:46 PM
02/13/11 11:46 PM
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tubtar Offline
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Magnum was Comp's name for them........has nothing to do with the magnum engine.

Re: rocker arms on 360 with 340 x heads??? [Re: Rapid340] #928271
02/13/11 11:47 PM
02/13/11 11:47 PM
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The newer comp magnums look a little different but should work the same. Fit along the shaft may be the same - fitup and adjust shims as needed. Comp will probably sell one.

I believe comp offers a rebuild service - worth checking at least. It might be a good idea to get all rebuilt in case another is close to failure.

Re: rocker arms on 360 with 340 x heads??? [Re: superstreet1896] #928272
02/13/11 11:48 PM
02/13/11 11:48 PM
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oberlin, Ohio
Rapid340 Offline
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I think the newer ones are called pro magnum. They are LA rockers marketed with the name "magnmum".


1971 Factory Appearing Duster 340 11.000 @ 122 mph
Re: rocker arms on 360 with 340 x heads??? [Re: Rapid340] #928273
02/14/11 12:06 AM
02/14/11 12:06 AM
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superstreet1896 Offline OP
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couldnt find anything that looked like those on comp cams website. keep the ideas rolling but i will call them tomorrow,.,. they do have an H engraved on rockers

Re: rocker arms on 360 with 340 x heads??? [Re: superstreet1896] #928274
02/14/11 12:16 AM
02/14/11 12:16 AM
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They do look like magnums, except for the square edge around the valve side of the "bathtub"...maybe older ones? they quit selling them about a year ago....right after I bought mine. There should be a CC embossed on them on the side.


Yeah, it's got a smallblock.
Re: rocker arms on 360 with 340 x heads??? [Re: 340B5] #928275
02/14/11 12:41 AM
02/14/11 12:41 AM
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If they really are 10 years old and you found a lose pin on one, I would be getting rid of all of them.


Fastest 300
Re: rocker arms on 360 with 340 x heads??? [Re: Crizila] #928276
02/14/11 04:57 PM
02/14/11 04:57 PM
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superstreet1896 Offline OP
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Any other thoughts on what these might be, not having much luck, plus if i do get new ones I dont know what the ratios are either. This will be my spare motor soon so i dont want to put a lot of money into this, like new pushrods and stuff.

Re: rocker arms on 360 with 340 x heads??? [Re: Crizila] #928277
02/14/11 08:22 PM
02/14/11 08:22 PM
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alaska,usa
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Quote:

If they really are 10 years old and you found a lose pin on one, I would be getting rid of all of them.



Re: rocker arms on 360 with 340 x heads??? [Re: 9secondsatellite] #928278
02/22/11 04:12 PM
02/22/11 04:12 PM
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superstreet1896 Offline OP
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could these be crower, any other ideas? i have had no luck with finding out what these are or the ratios. im affraid that it may break and dont want to take the chance. i have no racing this week but will be going to sgmp division race next week and would like to get it replaced.

Re: rocker arms on 360 with 340 x heads??? [Re: superstreet1896] #928279
02/22/11 04:50 PM
02/22/11 04:50 PM
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I was going to say CROWER, but I think they are discontinued. My buddy has a set identical to those on his small block chevy, with the exception his are stud mounted. but Crower should be able to work on them.

Kasey







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