Slack in new timing chain

The slack you are experiencing in the timing chain may be normal. There's no way for any of us to tell over the internet. None of them fit really tight. That could cause cam and crank bearing wear. IMO, I think you should simply get the good Cloyes true roller and the Cloyes tensioner. Put it all together and degree the cam with the tensioner in place. Regardless of how the chain fits, it is going to change cam timing once you install the tensioner, so you may as well get the chain that works best with the tensioner assemble it all and degree it that way. The cam timing is the underlying issue here and that would be the best way to make sure the cam timing is correct. Any timing chain stretch from the engine running from that point, is out of your control anyway, regardless of which chain you choose.