will 7/16 studs screw in stock heads or do i have to get heads taped for bigger studs? will i have any problems with pushrod alignment with the trickflow guide plates 30400623-8? went with new springs , now i have to get new roller rockers. i have comp magnum self align roller tip but new spring pressure is above 350lbs. i think i will try the summitt,jegs brand roller rockers they say pressure up tp 800lbs.

 

you can use 7/16" studs with no machineing
use NSA rockers with guide plates NOT SA

ISKY adjustable guide plates allow for spot on alignment

you need hardened PR with guide plates

 

I use:

ARP 7/16" rocker arm studs (bolt right on) part #: 134-7103
Trickflow Guideplates part #: 30400623-8
Comp Cams Pro Magnum 7/16" 1.6 rr's part #: 1305-16

 

x2 they work perfect

 

so the studs would be 3/8 bottom 7/16 top? the thickness of guide plate would raise the stud, would that require longer push rods? i all ready have trickflow 7.200 hardened push rods .i was going self align with the magnum roller tips, but now going nsa with full rollers and guide plates because new springs are about 150lb @1.800 install ,about 375lb open.

 

From the factory the bottom of the rr studs are 7/16 an the top are 3/8. The ARP studs are 7/16 top and bottom. And yes you will need longer pushrods

 

use a push rod check tool

 

If all you are doing is adding springs and roller rockers, then NO, you do not need to change the pushrod length.

 

but he is also talking about the rr studs and guide plates making the rr sit up higher

 

Wrong, the stud will sit higher, but the rocker slips over the stud, it's height remains constant. Milling the heads, lifter cup dimension change, valve stem length change, cam base circle change...those all affect the pushrod length, not the studs and guideplates.

 

o ok. Then i stand corrected

 

ok i got it now. i thought the stud was 3/8 all the way down. i will pick up a push rod length checker tool.

 

If all you are changing is the rockers and springs, you don't need a pushrod length checking tool, 7.2 chromemoly pushrods are what you need, part #: 21407200.