Should I make the swap to G3?

You can get connectors from DIY HEMI. I don’t know what fuel delivery you have but would recommend an in tank pump and a corvette filter regulator. You will also need a flex plate for the trans. Good luck. I couldn’t have done mine in a weekend, I don’t plan very well. I did do my my Alterkation in a day with the motor still in the car. Keep us posted.

If you need a list of connectors I might have it as well. I just completely rebuilt my engine harness from scratch when I did my MS3X computer upgrade. I found the actual connector models for pretty much every stock component on my 2006 5.7 at least. That way I could buy it at a housing and terminal level, not just pigtails that you have to splice. Usually quite a bit cheaper that way too as most connectors are really only a buck or 2 and most terminals are maybe 50 cents each plus a 10 cent wire seal. Beats paying $5 a connection like a lot of the places that sell connector kits charge.