go to a junk yard and buy a coil off of any older ford. will be super cheap. Just about all the older Fords used the same coild or they are at least close enough that it should tell you if your coil is the problem. I was having a similar problem and it was the fuel filter. This was on a 68 Galaxie with a 390 and during my trouble shooting process my father in law pulled a coil off a 6 cyl, falcon and put it on my 390 and it's still on there. Later found out it was the fuel filter was clogged and it was doing the very same thing you are describing. When everything came up to tem and I would push on the gas and put her under load it would buck and hesitate and pop back through the carb, acting like it was missing or out of time, new $3 fuel filter fixed my problem.
I wonder why the filter would act so differently when hot? The filter is new, but that's not to say it didn't get some junk built up in it. I'll try changing it out too. Thanks!
Using the digital temp gauges I've got, my coil read a max temp of 192.6 as it sits on my intake manifold. Thoughts?
