I am thinking about selling my LT4 SA rockers to upgrade to Promagnums NSA with 7/16 studs and guideplates but don't know if they will fit under my stock valvecovers. Anybody try this yet? LMK Later Clint.

 

Yes, you can do it (I'm doing it right now). The only thing you need to do to modify your stock valve covers is use a pair of needle nose pliers to flatten out the folds in the arches on the underside of the cover. Sounds a little confusing on paper, but just take a look under your covers and you'll know exactly what I'm talking about.

 

I couldnt get the supports to line up after bending the bottem part down, so i took a recipracating saw and hacked them out...no problems so far.

 

I'm doing it with Crane Energizers. No fitment problems at all.

 

Cool I'll be doing that too. Later Clint

 

What guideplates are you guys using for the 7/16 studs?

 

I have the stock VCs, I cut out the support and grinded on the other side. I dont recall which support I took out but one of them.
My GPs are stepped so I had to remove the support for them to work right.

 

Yes I am running nsa's with the supports cut.

 

It doesn't matter what guideplates you use as far as fitment goes....
IMHO The ONLY two to use are
GMPP or the ISKY's

 

Cool I hope the Comps I bought fit OK. I will know tommorow.

 

I'm running comp pro mags and guideplates. I had to clearance the back (closest to intake) brace inside the VC.

 

I am running the Comp Pro Magnum rockers, 7/16 stud, and guideplates. No problems here. I am using Comp's guideplates.

BRAD