No spark and i can only get 5V at the coil.

67Dart273 said

?ONLY? That ain't all that GOOD. Didn't you say this was a new battery rated at 6xx cranking amps? Hell that thing ought'a maintain nearly 11 cranking that little bitty thing.

Now don't get me wrong, it should crank, start, and run on 10.5V. It's just that I would have thought that battery would do better

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It definitely should do better, but it's up from ~8v which is a big improvement. Sounds like the battery was very flat - another issue to figure out once it's back to running. Oh, and I hate those 'green ball' batteries. Useless.. every customer I ever had in the past with one of those damn things thought it HAD to be good, but bad batteries were probably at fault for the vast majority of "old car" problems. If it wasn't the battery, it was crap grounds, and if not that it was wire nuts used on a million splices and ford relays randomly spliced into the harness any place one could be bolted down.

It sounds like spark might be improved from the coil too, but I'm waiting on the promised video vs reading between the lines :/ it should definitely clear up whether the ignition ecu circuit is working or not.