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Old 08-13-2004, 07:14 AM
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The standard rocker has a 1.6 ratio. I have seen it written many times that the AMC heads must be machined when installing roller rockers to prevent binding. Is this only necesary if you use guide plates or is it always required? I am asking this because many advertisements for the new Edelbrock aluminum heads contain a footnote that rececommends teh use of hardened pushrods and roller rockers with the new heads. Edelbrock has stated that the new heads are designed to be used with either the original stamped steel rockers or 1.6 ratio roller rockers. IT seems inconsistent.

Also, for those that have instaled roller rockers, what brand and type did you use?
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Old 08-13-2004, 07:59 AM
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what did Edelbrock say when you asked what the diff was ?????
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Old 08-13-2004, 10:02 AM
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std AMC heads...common type 609 or 502's have a small tapped hole and a high boss, the boss is shortened to get the right geometry for the roller or single rocker and the guideplates are used to utilize the pushrod from dislodging the roller tip off the valve stem..that help?
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Old 08-13-2004, 10:04 AM
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Good question gsmikie. The response I quoted above came from a forum question that I haven't asked for clarification on yet. I could call them, but I suspect that the typical tech rep there isn't up to speed on this yet.

[ August 13, 2004, 10:02 PM: Message edited by: TexasJ10 ]
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* 1981 stepside, 360, 727, 208, almost stock daily driver.
* 1982 Laredo j-10, 360, 727, in rough shape and in the process of being rebuilt with 401, NV4500, Klune,
. NP205,d60 front, d70 rear, fender work and minimal lift. It will probably take 10 years
* 1973 jcab mounted on 1983 j20 frame. 360/t18/208 d44/d60. Almost completed
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Old 08-13-2004, 02:31 PM
drgneer drgneer is offline
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I installed Harland Sharp roller rockers that have a shaft that links the int. and exh. rockers together to eliminate the need for guide plates. I got them directly from the manufacturer H.S. for about $470 for the whole kit (i'd have to dig out my reciept). nice workmanship and easy to adjust.



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Old 08-13-2004, 04:10 PM
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Thanks jeepr4ever and drgneer. I can see the logic in both approaches. I guess the edelbrock guy may be referring to the HS SV4004's that drgneer is using. I wish they were not so expensive. Their regular rollers for AMC's are only $200. With guide plates costing around $60, I suspect I can get them machined for a lot less than $215.

I think part of my confusion comes from seeing somewhere that the AMC head at one time was different and rollers could be bolted directly without machining as long as you put new rocker studs in. I thought maybe edelbrock went with that style rather than the late model style. I have to say those Harlands look pretty good installed. Are those heads aluminum as well? Do the sv4004's fit under the stock valve cover?

[ August 13, 2004, 10:16 PM: Message edited by: TexasJ10 ]
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* 1981 stepside, 360, 727, 208, almost stock daily driver.
* 1982 Laredo j-10, 360, 727, in rough shape and in the process of being rebuilt with 401, NV4500, Klune,
. NP205,d60 front, d70 rear, fender work and minimal lift. It will probably take 10 years
* 1973 jcab mounted on 1983 j20 frame. 360/t18/208 d44/d60. Almost completed
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Old 08-13-2004, 09:51 PM
drgneer drgneer is offline
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naw, they're stock heads (just milled a bit) with edelbrock valve springs and retainers.
Couldn't tell you if the Harlands fit under stock covers since I bought some edelbrock covers right away But judging by the looks of it I would say an almost definate no.
Thing I love about them is no floating at high r's.

btw... HAHAHA (for those of you already snickering [img]tongue.gif[/img] ) I finally got a proper throttle return spring
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Old 08-16-2004, 07:14 AM
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My Understanding is : Ford Roller Rockers can be used with a slight Mod - Of course like most useless info I never heard if you had to Mod the Head or the Rocker to do this ......
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