Timing chain
On my last build I ended up using a Summit double roller, it came in with a 1/2 degree of what the cam card said.
I had a Comp chain that was not worth the metal it was made out of, it must have had all seconds thrown in that box.
20 year old Mopar Performance I had new in the package was perfect.
Lastly I always liked cloyes, the last one I had rocked 4 degrees on the cam key-way, maybe I just got a bad one, but you have to check them all.