slow cranking starter

oley340 said

Good morning all I have a 1970 340 duster that is giving me grief. The engine turns over very slow even with the plugs out, i have tested the battery checked grounds and replaced the starter, should i replace the starter relay or am i missing something. thanks for any help

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Is the ground that's bolted to the starter and goes to the negative battery terminal the same gauge as the power cable that goes to the relay & starter? If you don't have one that fits this description, try installing one. This solved my slow cranking, and my battery is in the trunk.

The starter may only have one of the brushes worn to the point that it isn't touching the commutator in the starter motor anymore. Try switching to a Mopar mini starter is yours is bad.