Roller Rockers Under LT-1 Valve Covers

[mgd1790]

Hi, not sure what the brand is but these roller-tip ones for my 71 Z28 worked great.

 

[COPO]

Hi, not sure what the brand is but these roller-tip ones for my 71 Z28 worked great.

View attachment 216001

The roller tip rocker arms are not the problem, it’s the lock nuts.

 

[Cman]

Here's what I used for Poly locks that fit under stock LT-1 valve covers with stock heads without modifications. As others have said the rockers are not the problem.

Crower 86051S-16. They gave me the clearance I needed:
http://www.summitracing.com/parts/cro-86051s-16
Their specs are:
Overall Height (in):
0.865 in.
Outside Diameter (in):
0.530 in.

I also used FelPro 1604 double-thick gaskets. They worked great and reused them after my initial valve adjustment.

See: https://nastyz28.com/threads/lt-1-valve-cover-clearance.294588/#post-3405256

 

[AEGIS43]

I know, no one asked about a big block, I'm just throwing my 2 cents in making a case for spacers. These are 1/2". I'm pretty pleased how they turned out and I'm pretty darn picky visually. They don't leak.

 

[Strokedout]

Do Roller Rockers fit under LT-1 valve covers without spacers, etc? I did a search, but couldn't find anything.

I don't have any or have any brand picked out, so it is possible some may fit while some won't.

Thanks in advance....Gary

They should, I had no problem with my lt4 stock covers with 1.5 rocker. I also fast burn heads. If anything just get taller covers n spice up the engine bay.

 

[greeny]

I know, no one asked about a big block, I'm just throwing my 2 cents in making a case for spacers. These are 1/2". I'm pretty pleased how they turned out and I'm pretty darn picky visually. They don't leak.


View attachment 216015

I did the same thing using the spacers noted in my attachment. These are high quality american made and machined out of billet. They are hardly noticeable and I didn’t need to modify my original valve covers in any way. Also, I just glued the spacer to the head with the Right Stuff. The seam is hardly noticeable, and I did use a gasket between the spacer and valve covers. https://www.ebay.com/itm/1738681038...tVEWzbz+3NEAfXhq3QQDm2M35/|tkp:Bk9SR4TzhoOWZg

 

[70lt1z28]

Here's how close the stock, uncut 1970 vavle covers are to the studs. Hard to beleive any polylock will fit with the 1970 3-number covers.

 

[COPO]

^ LOL, that’s why I bought a 2nd pair of 3 numbered 1970 aluminum valve covers. Mine were kind of junk due to the 1st engine builder running a sander over the fins after spraying the covers all black, plus I had one mounting corner welded. So I snapped off a portion of my drippers when I use lock nuts.

 

[AEGIS43]

Here's how close the stock, uncut 1970 vavle covers are to the studs. Hard to beleive any polylock will fit with the 1970 3-number covers.View attachment 216129
View attachment 216127

That clay looks disgusting. Kind of like a Peter and the sword thing.