Dead on side of the road ! ! ! Help !

Could be a lot of things including the box

You said 7V at coil brown. Is that in "crank" or "run?" In "run" that would be normal

Is orange box GROUNDED?

Wiggle all connectors

Remove the distributor connector, with key in "run" repeatedly touch the ECU side of the distrib. connector to ground----the bare terminal. Should make a spark each time.

Here's my solution for firing up junk engines and 'mergencies...........a GM HEI in a box..........



Same circuit as what I run on the car........