Welding on car with Sniper EFI

Well Hello FABO.

1967 Barracuda Fastback 4 speed 383 with a sniper EFI.

Changing out the 14" summit mufflers due to my age and wondering everything I need to disconnect from the electrical system to weld on her. Mind you, I will be making only tack welds then removing from header collectors back for final weld.

Batt
ignition box
efi unit


anything else???

engine ground?

Thanks in advance.