I want to move up from a 1.5 ratio to 1.6 ratio rocker arm on my 383 and I want to make sure I make the right choice in rocker arms the first go around. These are going on factory vortec heads on my roller cam GMPP HT383
specs here
Here's a write up Hot Rod Mag did on this same engine several years ago. Their first step was to upgrade the rockers and they chose Comp Cams Pro Magnum 1.6:1 rollers.
http://www.hotrod.com/how-to/engine/...block-tune-up/
Looks like I need self aligning rockers, found these from the current offerings from Comp Cams
http://www.compperformancegroupstore...UltraProMagnum
I've also found these Scorpion Racing Products rocker arms to fit my application.
http://www.scorpioncheckout.com/category_s/85.htm
And lastly these GM rockers...
http://paceperformance.com/i-6255517...set-of-16.html
I need to figure out if my heads have 3/8s or 7/16s studs, is anyone for sure on that enough to save me from pulling the valve covers to look?
Also, does anyone have any experience with any of the above, either good or bad? I do have aftermarket tall valve covers but they are still the center bolt design can be a bit of an issue clearance wise with some of the above, mainly the Comp Cam rockers. From what I read the Scorpions are a bit narrower which fit real nice with no trimming necessary.
It's not a high revving engine, probably will never see above 6,000 RPM, so a street rocker should be fine...but I'd like to get any advantage I can while making the change and would prefer to do this right and once vs trying to cheap out. If anyone has any other recommendations I'm open to them as well.
Thanks for any insight you may have...