Car cranks but wants to start when i release the key but wont run

Here man.
Sounds like these guys are giving you good advice.
In short the blue wire you should check is fed from the alternator voltage and should measure whatever the alternators output is (whether its new or old, etc, this wire matches that voltage). Its what your ballast and control unit use to get running power as well.
If your battery wasnt recharging, then yeah you could worry about that pin, otherwise the regulator is doing its job as far as youre concerned.
The blue wire is shared with the left side of your ballast, as well as one of the pins to the control unit. The right top side of the ballast is to your ignition coil +, back to the blue , and sent to the column as well. Bottom Right side of your ballast is a single wire to the control unit. The other 3 wires on the control unit are coil -, and the dizzy +/-
This is for reference in checking the previously mentioned stuff by others. Ill attach a diagram thats colored to just make finding bit easier. its going to be about 99% accurate with the exception of a few wire colors of no relation to your needed help.
Also, the blaster ss is not designed for the orange box. You need to bypass the ballast to make it work and thatll just cook the control module if you do.
just for further info, the blaster ss coil is .333 and you computer is something like 3..... 3.2? and stock coil 1.8 and stock ballast at 1.4
its meant for a different type of ignition system entirely and could potentially me causing havoc with the orang box control module you have, or could be burnt up if you havent changed anything else out.
Hope this info helps

1974 Valiant Wiring Diagram Full_Edited.png