Looking to replace the rockers on my 88 with the L98 engine. My heads have slots, not round holes, and the stamped rockers look to be self aligning. All factory I assume, but is it common to have this combination? Whatever rockers I buy, should I use self aligning? Not sure I can find 1.6 ratio rockers that are self align, but could I use regular rockers with the slots in the heads as in older engines? I've searched and for sure the rocker arm topic has been really covered but I haven't seen this addressed.

 

I had the same setup on my formula. Slots in heads just large enought for pushrod to go thru and stamped selfalign rockers from the factory.

I have no idea what the factory was smoking when they did this.

I ended up breaking a rocker stud due to some unusual ware and a few others showed some ware patterns.

You sould only have ONE source for guiding the pushrods.

1 . Slots in heads

OR

2. Self aligning rockers

OR

3. Guide plates

I know run standard roller rockers, just use slots in heads to do the aligning.

 

If you want good self aligning 1.6 ratio rocker arms the only ones for these engines I could find are Comp Cams Pro Magun rocker arms part number 1316-16 or Crane Gold Race Extruded Roller rocker arms part number 10758-16. There are cheaper non self aligning rocker arms made by both these and probably other companies.