Re: no spark
It's common for the wire going into the distributor to get worn and frayed under the advance mechanism or at the grommet thus grounding out on the distributor housing. Disconnect the wire at both ends and use an ohm meter to check continuity across both ends and then against ground to check for a short.
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71 Blazer / GMPP ZZ383 / MPFI / 700R4 / 4-Wheel Disk / Ground-up frame off almost completed resto-mod
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