Help with head mods
Thread Starter
Racer
Joined: Jan 2003
Posts: 270
Likes: 0
From: Erie pa
Help with head mods
I had my LT4 heads ported and one of the things I did was make the stock roller rockers adjustable. However the studs I used 3/8" studs and the rockers are metric I believe, and they are a little loose by 18/1000 of an inch. Has anyone ever come across this problem? Any solutions
Burning Brakes
Joined: May 2000
Posts: 1,160
Likes: 10
From: Nashville TN
Re: Help with head mods (spinedoc)
The stock LT4 rockers are different than the LT1 and L98 rockers. You'd probably have to get normal rockers to use with the 3/8th studs.
The ones that GMPP sells are for the LT1 and earlier style studs.
The ones that GMPP sells are for the LT1 and earlier style studs.
Cruising
Joined: Apr 2004
Posts: 11
Likes: 0
From: Broadview Hts OH
Re: Help with head mods (spinedoc)
I just had a hot cam installed in my LT4. I also chose to have the orginal LT4 non-adjustable (10 mm) rockers replaced with GMPP 3/8" stud rockers and 3/8" studs so that the rockers would be adjustable. The 18/1000 gap will bring trouble. The GMPP 3/8" rockers (part#12370839) cost $320 at paceperfromance.com
Thread Starter
Racer
Joined: Jan 2003
Posts: 270
Likes: 0
From: Erie pa
Re: Help with head mods (spinedoc)
I guess i am out of luck. I was hoping to find a 7/16 screw in stud with a 10mm upper to use the same rocker. I will try the factory setup and check to make sure that it still works with the milled heads and different sized valves.
