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Rocker Studs and Guide Plates |
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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5799 |
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Posted: Mar/11/2018 at 5:38pm |
Can somebody tell me what length rockers studs are used to convert the 291C heads to adjustable rockers and what guide plates are used?
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Rebel Machine
AMC Addicted Joined: Jul/03/2007 Location: Western Il Status: Offline Points: 5122 |
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Think I've always used ARP 7/16" small block Chevy rocker studs. Shouldn't need guide plates on those heads. The pushrod hole is barely big enough to fit through as cast. -Steve- |
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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5799 |
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Should add that I have Harland Sharp rockers for 3/8 studs.
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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5799 |
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Turns out the heads are 993 castings, so it looks like it's a late 71 motor with lower compression (helps to explain 130 psi on the compression test), but I did see that the heads have slots for the pushrods, so definitely no guide plates required, just add rocker studs and it should be good to go.
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73hornut
AMC Addicted Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3130 |
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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Do you have a part number? Comp lists as "High-energy", magnum and so on - nothing mentioned about dimensions or low profile in the searches I've been doing for my 73 360
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Lyle
AMC Addicted Joined: Jul/17/2014 Location: None Status: Offline Points: 772 |
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This post has info:
http://theamcforum.com/forum/rocker-arm-studs_topic56217_page2.html Comp states 1.750" long. There was a post that stated to use straight studs for the Scorpion you have. If that is the case you can make your own and cut the length you need: https://www.fastenal.com/products/details/47455 A little above grade 5 for yield strength but not grade 8 that is to hard for the application. This is tempered chrome-moly steel.
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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Hmmm, that's pretty good info. Thanks.
I suppose I could also chuck up each stud and shave off the "shoulder" portion....... but that's a bit more work.
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73hornut
AMC Addicted Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3130 |
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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My rocker arms are for 7/16" studs...... SCP1055BL
So that would be the 4501-16 and wow another almost 20 bucks for a 7/16 vs 3/8" wow 35 to 54 bucks just going from the 4502 to the 4501 |
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