[304065]

Jeff,

As long as the cap fits tightly and doesn't rotate you should be fine. See picture above of the old cap, you can clearly see the half-moon shaped notch that is designed to clear the plastic insulator for the points. You can either grind a notch in a new orange cap or grind down the plastic insulator so it will clear. I chose the second route because I replaced the insulator.

Re the rev-limiting rotor, I haven't detected any differences in the advance curve. It is actually easier to set the advance with a VW style non-rev-limiting rotor because you can clearly see the middle of the contact point.

The MSD rev limiter is a lot more accurate than the rotor. In that same old issue of Upfixen, there's an article that talks about using an electronic rev limiter instead of the expensive ($29 back then, which is a fortune today) Bosch rotor. Plus the standard deviation of the rotor's cut-in point is probably 500 rpm, and the resistor in the rotor may burn out. So I would say VW rotor is OK.

How did you set up the tach drive? Are you using the MSD tachometer output?