67 twin turbo dart

I've been going through the program and cant really find that its changing. But did find 2 more spark plug wires that had damage, so replaced all of them with Accel ceramic coated ones. They are smaller in size compared to the taylor 10.4mm these are 9mm. But while having the valve covers off to change plugs found a intake rocker arm really loose on adjustment, nothing stripped. How often do you all check your roller rockers with a solid lift cam? Will be adding this to the list now of checks.