Need some tips on the install of these 1.75 Comp. Pro. Magnum rockers . Was looking at some parts I had and found these forgot I had them why not install them .Comp 1.75 roller rockers in my 04 LS-6 stock cam motor . Will I need longer push rods ??? Going with 1/2 turn on pre load is this right ..Retune ? ..Any tips on the install would be helpful .. Been a few years scene I worked on a motor got rusty I need a little refresher.. Thanks

 

I know somebody works on the motors ..

 

Never added them to an LS motor but that sounds right. I can't see that a retune would be necessary but they seem to be beneficial on most motors. I'd do it if I had someone close that I trusted. Here is what I found using Google:

Installation
Installation is easy, if you take your time. One very important step is to place the new rocker arms into position to make sure they don't hit the head casting. This is a really serious problem with some aftermarket rockers.
The really good rocker arms use a stud and nut to hold them in place. They also use pushrod guides to keep the pushrods in place.
The real trick is to tighten the nut on the rocker arm stud down far enough-but not too far. The LS engines all use zero valve lash. In the old days we used to tighten our small-block rocker arms down until we could no longer rotate the pushrod. On LS engines you can't even reach the pushrods. D.J. Racing has developed a little time saver here: a 0.001 feeler gauge. After rotating the motor until the appropriate valve is closed, tighten the rocker nut down until the feeler gauge is tight. The difference between 0.001 inch and zero is negligible.
Take your time and make sure everything is just right. If you get this wrong you could push a valve into the top of a piston-at 6,000 rpm. You don't have a lot of clearance to work with. Be careful.
Changing rocker arms won't give you that magic 50 hp that you see in the ads. It should give you at least 20 though, after about a day's work. Even if it takes you the whole weekend, that's no big deal. A weekend in your garage is far better than a day at work.


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Also, stock LS pushrods are 1.7 ratio. The gain would be negligible. Not really worth the trouble, it seems.

I'm an old school guy as well. Swapping cams in our old Gen 1 small blocks is a piece of cake compared to the newer stuff...

 

Thanks for the info and the link and yes old school for sure .I have an 04 Z-16 I have been working on is all cute up now, how we going for more HP this fall 228R TX Speed ported heads cam it has headers Etc.. bolt ones ..A new learning curve go me on this LS motor with a little help for the internet and from some good people I'm getting there .looking for C-7 Rwhp . I think it will be that hard to do ... Heck on the track I run with and out run C-6 Zs now.. Thanks..