Most all injection-moulded thermoplastic distributor caps, including Mopar caps made since the switch to thermoplastic in the early '80s, tend to have smaller-OD towers than most all compression-moulded thermoset phenolic/alkyd caps. Brand does not matter. The Magnecor folks are still working on boot selection for slant-6 wires, and it's been pretty hit-and-miss for some years now. Earlier this year I sent them several caps, both injection- and compression-moulded varieties, and they sent me a set of wires with distributor-end boots that snugly fit the smaller-diameter towers on an injection-moulded cap. Donno when you ordered your Magnecor wires, but your beef lies with their boot selection. They'll probably send you smaller-ID distributor-end boots if you ask them to. Or you can scruff around looking for new old stock distributor caps!
A more solid reason to shun the CH-410X distributor cap is that it no longer exists in Standard's product line. There's been previous discussion on this topic.
Olaf, by all means come up with your own distributor cap recommendation based on whatever you wanna base it on. People will follow whatever advice they find to work for them, and that's as it should be. Perhaps things work differently in Norway!
