1965 valiant 225 timing issues.

Have you checked for slop in the timing chain, that can affect timing
I hope not. I hate to have to pull the motor apart.
I have been puttering around with it and I ran the valves. A lot of them were tight which I thought was weird. I also replaced the motor mounts. Did some fine tuning on the idle screw and it runs pretty good now.
I got the pcv hooked up and it cured the blow by problem. However there is a vented cap so do I need a sealed cap so the engine doesnt have a built in vacuum leak?