[6pack] TR-6 problem

[Bill Wellbaum]

My '75 Tr-6 has developed a perplexing problem.  It starts easily and idles
smoothly on all 6 cylinders.  As I start out in first gear the car begins to
buck and jerk almost as if someone was switching the ignition key on and off.
Literally that severe.  And it will not accelerate at all but bucks and jerks
with some spitting back out of one of the carbs.
Over the weekend I have replaced:
Plugs, plug wires, dizzy cap, rotor, points, condenser, low tension lead
block, fuel pump, and fuel filter.  I have disassembled the two Zenith carbs
and found the float bowels to be spotlessly clean and the floats set to spec.
No improvement.

The battery is putting out 12.8 volts.  When I put a multi meter across the
positive pole on the distributor with the ignition key on the best I get is
5.5 volts--and the two wires ending up on the positive side of the coil are
warm to the touch.

Where do I go now?  What should the reading be at the positive terminal?

Bill Wellbaum
Frustrated in Las Vegas