You can connect it as Tom stated but you will need to run a ground wire, as the sweep speedo cluster is plastic.
If correct is a concern. The clock on a 70 sweep dash, from the factory or by the dealer, used a separate harness that connects to the BAT terminal on the fuse block for power and at the parking brake for ground. The SS or optional gauge dash has the clock power connection built into the harness.
If correct is a concern. The clock on a 70 sweep dash, from the factory or by the dealer, used a separate harness that connects to the BAT terminal on the fuse block for power and at the parking brake for ground. The SS or optional gauge dash has the clock power connection built into the harness.
