[firstgenaddict]

If the coil doesn't need a resistor wire (because it is internally resisted) then the combination of voltage drops may bring it down to 3-4 volts-

Pull the positive wire off the coil, attach a multimeter visible inside the car, then click the switch into the RUN position and check the voltage - if there is a resistor wire I believe the voltage should be 7-8 volts.

Poly locks will come loose if the top of the stud is not flat and square, many times the studs must be machined in order to achieve such a state.

Are you cold lashing or hot lashing the valves?
Many of us prefer to cold lash them... if you are not doing it this way here are the procedures as laid out by JohnZ and Duke Williams. PLEASE refer to your cam card or check your documentation for the appropriate clearances.

Procedure is as follows:
Bring #1 to TDC on compression stroke - adjust 8E 2I
- rotate the crank 90deg adjust 4E 1I
- rotate the crank 90deg adjust 3E 8I
- rotate the crank 90deg adjust 6E 4I
- rotate the crank 90deg adjust 5E 3I
- rotate the crank 90deg adjust 7E 6I
- rotate the crank 90deg adjust 2E 5I
- rotate the crank 90deg adjust 1E 7I