Holley EFI harness adjustment
Mouser is where I get most of my terminals and connectors. I find them cheaper than most but you have to know the details of what you are looking for. Del City is where I buy my wire.
Most of the Holley stuff is Delphi GT 150 connectors. The terminals and seals you need will be dependent on the gauge of wire you are using.
I’ve made hundreds of crimps with the Iwiss 1424B.
$18 on Amazon.