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roller rockers/studs
Hi ALL, I received my roller rockers for 3/8" studs. Then realized my studs are in fact 3/8" measured at the pressed in portion and on the threaded portion the studs only measure 5/16" (in fact they are 5/16"-24). The rollers of course come with 3/8" locking nuts which are too big to screw on tight! What does one have to do to make this work? Thanks for any advice!

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71-73 Mustangs never die, they just go faster!
Convert to 3/8" screw in studs. Chuck
[+] 1 user Likes c9zx's post
(08-26-2018, 08:07 AM)c9zx Wrote: Convert to 3/8" screw in studs. Chuck


Yep. Convert to 3/8

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason

[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
Are there any 5/16" locking nuts? How do I convert to 3/8" studs? How much is involved in doing that? Machine shop involvement? Thanks!

71-73 Mustangs never die, they just go faster!
You can not use 3/8" trunion rocker on a 5/16" stud. The conversion is best done by a machine shop that can accurately drill and tap the heads. Chuck
Are the threads in the head stock?? They make kits so you don't have to machine the heads. They are not designed for high hp or a lot of spring pressure, but in your average build will hold up fine. I believe something like this.... https://www.summitracing.com/parts/crn-3.../make/ford


1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]

Yes the threads are stock. What are trunion rockers? Someone talked me into buying these. I think there's too much involved I'm going back to my old regular rockers. Thanks for the replies but never mind. I was going to install my engine in a few weeks anyway.

71-73 Mustangs never die, they just go faster!
The trunion is the center pivot points. Chuck
A trunnion is the round portion of the rocker arm that the stud goes through and serves as the pivot.

Are your rocker arm studs screwed in or pressed in? I ask because in your first post you say they measure 3/8" at the pressed in portion.

“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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