Look at the positive connection on your coil. If the original wiring is still in place, you will see two wires joined to a single connector on the positive side of the coil. One of the wires is sort of translucent. That's a resistor wire that was used to replace the external ceramic ballast resistors that were used on the earlier cars (prior to '74). That wire serves as the ballast resistor. The resistor wires used on '74 tiis are 1.8 ohm and are all you need to work correctly with a 'Red' coil. Standard 2002s '74-76 also use a similar resistor wire, but with 0.9 ohms of resistance instead of 1.8 ohms. One of my manuals pointed out the difference specific to the '74 tii. Being that I don't always believe what I read, I actually tested the resistance of the wire on my '74 tii and sure enough it tested out to be 1.8 ohms. The resistor wire on the '74 tii runs from fuse #12 all the way to the positive side of the coil. On regular 2002s, that wire is about half as long and ends somewhere about midway in the wiring harness on way to fuse #12. The extra length of that wire on the '74 tii accounts for it having double the resistance of the wire used on standard 2002s. If you want to bypass that wire and run an external ceramic resistor, it's easy because you can just unplug the wire from fuse #12 and run a new wire to the external resistor in it's place.
Good luck,
John