Exactly what needs to be done to run roller rockers on the late model heads?
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Exactly what needs to be done to run roller rockers on the late model heads?
The pedestals need to be milled about .250" + the thickness of the guide plate you use, usually about .375" (.250" + .125" for the guide plate). You need the stud holes drilled/tapped to 7/16", the base of both 3/8" and 7/16" studs are 7/16".
You need guide plates, hardened push rods, small block Chevy studs, and of course the roller rockers and jam nuts that match the diameter of the stud you choose.
Bob
tufcj
Bob any specific recommendations on guide plates, studs, rollrs?
Does anyone make an all inclusive kit?
MC sells the guide plates and hardened pushrods here (shameless plug, click "products" at the top).
I used ARP studs for a SBC and 3/8" Crane Gold rollers on both of my motors. I didn't have to use guide plates or have the machining done since I'm running the 1970 291-C heads.
I can post up the ARP and Crane P/Ns if you need them.
For about the same cost, you could put on Harland-Sharp rollers that require no machining. I think the P/N is S4004 on their web site.
Bob
tufcj
THANKS BOB. THIS MAKES IT EASY. IF I GO WITH THE LATE MODEL HEADS I'LL JUST BUY THE KIT FROM HS. NO MACHINE WORK REQUIRED...
STILL NEED TO DECIDE ON THE 291C HEAD OR THE LATER ONES......
here's the number for the Harland Sharp Part# SH40046A
Scorpion also makes a bolt-on Roller Rocker for the late-model AMC head. You have to purchase the Ford rocker pedestal piece separately, which aligns the rocker to the valve.Quote:
Originally Posted by mkzmomo
http://www.mountainperformanceonline..._p/scp1097.htm
BTW, they list them as V6 ... they ARE the V8 pedestal rockers. Even had a set for a while, but returned them to run the early 291C heads.
These are A LOT cheaper than Harland Sharp rockers.
Greg thanks for all your help. I am going to run some type of roller not sure yet.
Joe,
If you go with screw-in stud rockers, you can get AMC-specific 3/8 or 7/16 studs from WSC in GA. www.classicone.com ... in the AMC section. They are made by ARP. I spoke with Ron Waters yesterday about them. He's very helpful. They're made to simply screw in on the 1970 heads, no machining what so ever is required. Later heads need the typical milling of the embosses and taped for 7/16-14 threads for the stud. Also, Ron said the 1970 heads are fine without guide plates.
Aluminum rockers would be fine for the truck engine ... that's what I'm going to run on mine.
I am going to run the Harland Sharp 3/8 rollers. I spoke with Ron and he is sending the studs to me. Since I am using the early heads ( 1971) I don't need the guide plates.