Anyone have idea where I can locate a set of complete rocker arm assembly for 426 Hemi
Does the 426use different set of shafts than a 440?

Very different. We will need some more info on the engine and it's application to make a recommendation on rocker assemblies. There are a bunch of different ones and their quality, application, and price varies widely. But none are cheap, not even the cheap ones.

I use to race a 426 hemi in NHRA stock back in 1974 to 1976. I went through around 4 sets of stock 426 rocker arms looking for the best set, I checked all of them on the same legal camshaft on one side of my motor with light checking springs , I saw between .430 to .530 lift on all of those rockers. Legal was .484 on the intakes and .466 on the exhaust, I think
My message is those stock rocker are not very good on the accuracy of the ratio on them

My stock hemi rockers were within .010-.015 of each on all.

I just bought a TD rocker set for my Indy heads. Don't know much about them. My engine builder suggested them. The motor will be on the dyno in the next couple of weeks. I'm not saying I'm going to make anymore power with these but didn't want to use Indy's rockers.

Buy some good aftermarket rockers. The money you will spend buying used OEM and reworking them to a good set you can buy a set of Stave V or similar.

I wonder if they had been rebuilt and blueprinted before you got them
I wished that I had a set like those

Once I had a set of matched Wide pad stock rockers and they came from an A/Gas MPH record holder who had retired (Bill Drake). A set of OEM rockers is gonna run you $1600-$2400, then they need to be re-bushed and ground (matched) and their still 45-55 yr old parts. For the same and maybe a little less money you can have a set of Stage V brand new rockers, and good luck finding Wide pad rockers. With any luck you may find some used Kluf rockers but you are going to pay dearly for those too.
At the price these thing are going for I wish I had all the sets I've sold back...to sell again!

Depending on what you’re building, the ones from Mancini for $1900 might be all you need.

They’re what Muscle Motors used on the 572 giveaway hemi.

H Got mine from Todd @ http://www.mopartsracing.com/

Stage V from Bob Massolini for reference.

Mark

I tried to get my factory rockers blueprinted by t&d, I was getting .100 difference between all 8 of both intake and exhaust. I wound up with StageV and they were within .005. I also installed dechelles top fuel shaft because that is what he gave me a deal on. Worth buying good rockers the first time around.

I have used RAS twice to bush and blueprint ductile iron BB wedge rocker arms, both time took longer and where more expensive than promised, no more for me

Thanks
It’s just a stock build, nothing wild ,

I have an extra set of clean used stock rockers, if you're still looking.

Once you have those, then get shafts+shaft stands and you will be well on your way.