HEI Conversion Done still not starting

Hello all
I have a 74 Dart 318, been giving me trouble for about 3 years now,
finally about 5 months ago, I reset the timing by using just a vacumm gauge,
worked great, no more pinging or missing. then I did a stupid thing and uped the
RPM. well that set everthing backwards, I reset the RPM to where I had it but
it did not make a difference, car is not running good any longer. So I thought
I would switch to the HEI gm module, I did this on my 351c and it worked great
but in the mean time, on Sat, last I stopped for gas in the Dart, and she would not
restart. pushed her out of the way and went on to my business lunch, then came
back for the car and had it towed home. After doing some voltage checking
I had to Volts after the balast resistore... but since I was thinking of changing
to the HEI, I went ahead and did the swap.. I do have 12v really 10.7 at
coil + - and HVT. also at the G and W connections on the HEI module.
12v + - at the Dist cap tower.. but no volts at the spark plug.
I have a rebuilt Dist in the trunk so was going to swap it out just to see if
maybe the Dist pickup was bad, but it will not fit into the (hole).
I have read about connecting the old unused connectors for the balast resistor
together, Why? also something about connecting the (dark blue"run wire" and the
"brown" wire together) Why?
since that all goes to the old ecu .
Best

PS: So I just went out side and worked on the Dart, after reading some of your
posts I followed the info you gave.
I connected the brown wire to the (double Blue) and the car started.
I had by passed the MDS canister coil and used my Ford coil...
So I was excited and wired the MDS coil back into the loom, and the car would
not start. giving me the impession that the coil faild...
Those Ford coils (got mine at the wreaking yard) are great
So tomorrow I'll re time the engine, then head down to the wreaking yard for
a couple of extra coils...
but glad to have the dart running again... without that old ecu.
I paid $10.50 for my gm HEI off Ebay...
best