Not trying to lecture, but it didn't occur that was important? We all should keep in mind, that, whether Mopar, GM, or Ford, those guys did NOT SPEND A DIME (or a nickel!!!) on something that was NOT required to make a vehicle operate.
I recommend a better ground. Your engine, where LA or B/RB, has at least one bolt hole on the end of the head. Get a short bolt, make sure it does not bottom, and bolt a Ford style "starter cable" AKA an eyelet to eyelet cable--from the head to the firewall. Sometimes the master cylinder studs work for that. Otherwise, find a spot on firewall, drill through, scrape clean, and bolt the cable to the firewall.
Also some these girls had 1 or 2 small grounding flex cables from the block to the firewall.