chevy style HEI on 318

Do I understand this correctly?
I'm confused by what I read.
Is the 1.5 resistance necessary to protect the Chrysler ECU or the coil?
This seems to say both things. Perhaps it is both things?
(And the canister coil picture is of a "Flame Thrower". So I assume that coil has 1-1.5 ohms resistance in it.)

Mopar HEI Conversion
Are all electronic ignition systems HEI systems too?
No. The original Chrysler electronic ignition system is not an HEI system. First, it requires a ballast resistor in the primary circuit to decrease the power going through the control module. It was not designed to switch that much power and will fail if you run it without the resistor. Second, it uses a relatively low power coil. The old canister style coil can't put out the kind of power that an HEI system can without overheating the coil.

And.

What is the difference between an HEI coil and a canister style coil?
An HEI coil has very low primary resistance, typically in the range of .3 to .5 ohms. This is the total resistance of the primary circuit and allows a large amount of power to build in the system. A canister style coil requires from 1.0 to 1.5 ohms to survive without overheating. The coil used in HEI systems is a different design, called an E-core because of its shape. This design of coil is inherently more efficient, resulting in less noise (good for computer systems) and less heat. The picture below on the left is a typical canister style coil, and the one on the right is an E-core coil. Both pictures are from www.summitracing.com


Secondly,
FBO Ignition, Distributor tuning and Carburetion Professionals, FBO Ignition systems, Ford Ignition, Mopar Ignition, Ford Distributors, Mopar Distributors, Ford distributor curving, Mopar distributor curving, HEI Ignition, MSD ignition tuning,
shows a picture of a "Flame Thrower" canister style too. Since I've assumed this particular coil has 1-1.5 ohms resistance and this ECU eliminates the ballast resistor does that mean it does something the Chrysler ECU doesn't to prevent overheating?
In other words do ALL canister types have the higher resistance or not.
And if it is the case they all canisters have the 1-1.5, I assume this new ECU prevents the problem of running the ECU with no ballast resistor.
But what about the coil?
Or did the Chrysler original coil simply have less resistance than the "Flame Thrower"?

If I go with the simple four pin, what is a good source for a quality module and coil? Are the products still good or made in China?
No junk yarding.