Starting circuit wiring

We're looking for some routing and sizing advice for our starting circuit wiring.

Car is a 1963 valiant.

Dashboard and all wiring harness came from a 1965.

Small block engine.

Here's my plan thus far.

Battery cable from battery to starter.

Feed 6-8 guage from large starter lug to large starter relay lug.

Does this routing and sizing sound correct?

We're also planing on bypassing the amp guage, running two dedicated 8-10 guage feeds through the firewall from the starter relay. And wiring the alternator directly to the starter relay.

We're also adding a dual field alternator/regulator, and an electronic ignition. But that's another conversation for another day. Lol.

Thank you again for your help. Thanks. Eric and Jason