My car came with 2 cork gaskets on covers. i had to change the head gaskets so i put 2 new cork gaskets back twice and still won't stop leaking!
even put a little rtv. any suggestions?

Why would it need 2 gaskets?
I have always used cork on valve covers.
Make sure everything is clean and flat.
Sometimes a little silly cone to fill gaps.
Cork is a soft materiel don't over tighten.

i was just coping what was on the car! and didn't want any problems.

I understand.
Problem is you might have been copying a band aid.

I use the reinforcements around the bolt holes. They needed some slight modifications since they are meant for shivvies, but they helped. I have also had good luck using Superformance gaskets against the head with a cork/rubber gasket glued to them and against the cover. The cork tends to mash out around the thin head rail but the Superformance holds up there better. While the cork follows the contours of my steel valve covers better than the harder gaskets.

Typically Hemiroid, it takes $100 and a lot of work just to gasket the valve covers. And mine are pretty good, but are not bone dry.

1. Establish what area the leak(s) are coming from

2. Remove and check for the impression of the head seal in the bottom of the gasket. This can go a LONG ways towards identifying the problem / area

3 . Try setting the valve cover on the head without gaskets and "rocking" it Checking for flatness.

4. Check the areas surrounding the bolt holes as they sometimes get stretched ( depressed) from over tightening. If so re level using a small hammer and dolly.

Two gaskets are sometimes used because of a sealing problem or to allow additional rocker arm clearance. When doing so I always put sealer between the two.

Also might want to check and verify that you are not building too much crankcase pressure

Right, first thing to do is try and figure out what problem was being addressed with the double gaskets; Rocker clearance from non-original rocker gear? Valve covers with deformed flanges or oversized holes, etc. If rocker clearance is ok with a single gasket go with a single new cork gasket, clean the flanges of the covers and the rails of the heads with a good solvent like acetone to get them clean and dry. I never use gasket sealer of any kind on either surface.

Trial fit the gaskets to get them seated well into the valve covers, place them on the heads and make sure the flanges and gaskets sit flat everywhere, the gaskets need to fit and follow the flanges, takes a bit of finesse sometimes. Tighten the bolts to just "snug" don't overtighten them! then follow around and snug them again, I generally grab the head of the ratchet and twist with my wrist rather than to go out on the handle adding a lot of torque. Once you fire and warm the engine go back and re-tighten all the nuts as the gaskets often get soft and leak after the first fire up. .02

Are these stock type stamp steel valve covers?
If so make sure the gasket surface the V.C. gasket seals against on your covers is flat and straight, no dents, low spots or high spots
Once you know more let us know what you find, them DANG HEMIROID motors can be a pain sometimes
AKA aside, you can fix it

ok, will do! but should i use cork or felpro?

Cork

Not rubber or neopreme only, maybe a mix of stiff cork and rubber
How many different types of valve cover gaskets does Fel Pro offer now?

the covers look like an aftermarket chrome, i'm guessing the 2 gaskets were for clearance for stage v rockers.
as there were marks on inside of covers!
So No rtv Nothing?

Even with two gaskets there may still be clearance issues You have to identify where and why they are leaking.

Read the previous responses

No RTV. But I do use Hylomar A/F between the gaskets and between the gasket and valve cover. It is expensive, but there is nothing else like it.

https://www.amazon.com/Hylomar-Advanced-Formulation-oz-Tube/dp/B00XLWUVJY

Chrome, being a really slick surface, is leak prone. I usually sand away the chrome on the mating surfaces to get a better seal, this would also be a case where sealant might help, I second the Holmar AF is a good product for this.