Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

rockers and push rods

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Old Oct 5, 2007 | 04:18 PM
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eep4life
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Default rockers and push rods

ok guys so i might go out and buy some new rockers just because i have replace everything else in my heads so why not the rockers and push rods to.
so i have a 1969 with a 302 the heads are stock but have been resurfaced and ported. and they have the 5/16 studs on them what are some options for me to look in to... what rockers, what rods, length....etc and possibly not to expensive?
Old Oct 5, 2007 | 06:00 PM
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Default RE: rockers and push rods

sry guys i put the wrong size stud up there the first time but i fixed it.... so any ideas
Old Oct 5, 2007 | 07:04 PM
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Default RE: rockers and push rods

I would search e-bay for some 1.6 roller rockers. It might be harder to find the 5/16. If you can't find 5/16 they make studs that are 5/16 X 3/8 studs. The 5/16 screws into your heads and then you can use the 3/8 roller rockers. The Scorpions are a good deal. You can find them for under $200 I believe.
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Old Oct 5, 2007 | 08:41 PM
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Default RE: rockers and push rods

if the heads are stock from 69 the studs are 5/16 threads but the actual stud is 3/8 anyways.... what you would need to do is have the studs pulled and have screw-in studs installed. then you will have 3/8 thread and be able to use a "regular" roller rocker setup. crane energizers are a personal favorite of mine because you cannot beat the quality for the price.
Old Oct 6, 2007 | 11:10 AM
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Default RE: rockers and push rods

To expand on what My77stang said, you really do need to machine the heads to have good studs installed. The machine work isn't too pricey, and is well worth the effort in the long run.

Roller rockers, guideplates, and hardened push rods are a good investment as well. Just be sure your valvetrain geometry is correct after the change.

The original studs are press-in's and will pull out over time, killing both the geometry and effectiveness of the cam.
Old Oct 6, 2007 | 12:26 PM
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Default RE: rockers and push rods

If they are true 5/16" then they're pedestal rockers. Pedestal are fine, they're just non adjustable. Make sure you get the right setup though, either the pedestal rockers, or the 5/16 x 3/8 stub kits, or whatever stud size you have if it's not actually a 5/16 capscrew
Old Oct 6, 2007 | 02:27 PM
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Default RE: rockers and push rods

Stud != pedestal. Stock 302 from the 60's would not have pedestals, either. The stock stud is 5/16" and is pressed in.
Old Oct 6, 2007 | 05:28 PM
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Default RE: rockers and push rods

That's why I said 5/16 capscrew. A capscrew is not a stud. And he never specified what year heads he has, later model 302 heads are pedestal mount and not stud. Crane and others make a kit that is a 3/8 stud mount, but the bottom portion of the stud is 5/16. It's designed to convert a factory pedestal head to 3/8 stud without drilling and tapping the bosses. That's why he needs to specify whether it's a pressed in stud or a 5/16 capscrew thatholds the rockers down, or at the very least specify what year the heads are
Old Oct 9, 2007 | 01:08 AM
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Default RE: rockers and push rods

ok guys i snaped some picks of the studs.. i believe the heads are off of a later year mustang maybe from the 70 80s time era but im not sure so maybe these pics can help..... i really just want to replace the old rockers and rods.. nothing to fancy... i dont have much money to invest in this....




Old Oct 9, 2007 | 01:34 AM
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Default RE: rockers and push rods

Those are pressed in. You options are definately limited unless you take the heads to a machine shop and have the heads machined for screw in studs.
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