I had a similar problem once. The factory cables are a smaller guage than newer cars. The factory batteries had less cranking amps than newer batteries. Basically, the cranking melted the positive cable and wouldn't allow enough juice through to start the car. I would guess that you smoked the solenoid and maybe even melted the positive cable in the process. If the cable is melted, you will feel it. If the cable is smooth, then it didn't melt, but if you feel a depression anywhere, change the cable.
Like the others have said, try a fresh battery instead of trying to jump it. If it doesn't crank over, then check the starter. If that doesn't work, then check the timing. This is the order of least amount of work to most amount of work.
My Project: 1970 Mustang Convertible (currently stashed at my parent's house 1-1/2 hours away...ssssllllllooooooowwwwww progress)
Garage with my FX4 and 1970 Mach I
"That guy is so detailed that he would rebuild the engine to change the oil."