When I built the 340 engine for my Duster, I bought a new Comp timing chain set, it was junk, as loose as an old wore out chain.
Sent that garbage back.
Looked around in my stash of parts and found a MP double roller timing set, never opened still in the packaging, I must have bought it a long time ago and forgot about it. Anyway the MP chain fit so tight it was actually difficult to put on.