Duetsch connectors are much cleaner smaller and many bulkhead fittings for firewall pass throughs. I use Milspec connectors for the bulkhead stuff. I also prefer a "floating ground", no chassis grounds on the car. Everything gets power and ground directly to the battery.

Weather Pack are good for certain things such as 2, 3 or 4 wire connectors that are exposed to the weather. They are most often used for trailer connectors. They are easy to put together and easy to take apart and easy to repair. They get really bulky once you get over 3 or 4 wires.

EFI vendors have all switched over to MetriPack which is a very common connector style used by newer GM vehicles.

Deutsch stuff is great. The tooling is not cheap though so it's a bit of an investment if you want to go that route. I didn't go for the Mil-Spec connector. The black firewall plate is from Maven.

My Duster will be running Holley EFI so 85% of my wiring is a mixture of Deutsch and Metripack connectors. All the wire is TXL.

I was going to invest in Deutsch a while back, but many of the numbers were unavailable. I don't want to get stuck not being able to get what I need. Probably a better situation now. But I've stuck with the weatherpack stuff. I already have a bunch of that on hand. Plus it's cheaper. I wouldn't care but some of these guys think a big roll of red wire, an assortment of connectors from down at the auto parts and a half a day is all you need.

I use a couple of points in the car to place/weld bolts to provide an attachment point for battery and heavy grounds. But I also don't rely on the body for grounds. I use wire or cable to connect everything in the car with copper to the battery(s). The only exception would be an OE type light or similar item.

Is there a real benefit to not having any ground point attached to sheet metal when a copper ground circuit or loop is used throughout the car? Or are you just ensuring everything is connected to the battery with copper?

Everything goes back to the battery, but done through bulk head connectors that are connected directly to the battery. Nothing is grounded through the chassis. Other than I still run a ground from the frame to the battery. Dont need it but my head tells me to We don't ground the battery in any of the dragsters.

We used all Deutsch connectors on my car and did my best to hide most of the wiring.

Well, I got the rest of the wiring almost completely out from under the dash now, and damn if that switch panel wasn't the last item to come out...It was in there a little too good. But now I think I found my main issue with the cooling system. So, I think I had the water pump on, when I kicked the car over with the starter....I think that is what killed the cooling system switches on the ARC Panel....The fuse wasn't blown, but melted to the posts, and so was the wiring. The switch has a high and low, and the low is burned right out. This car had been rewired more than a few times, and nothing was isolated from each other.

Hoping the new Leash board takes care of issues like this.....I am going to change how I have some things activated as well..I had an epiphany while thinking about this today.

The new plan, use the new switch panel to activate just the ignition, water pump, driver fan, and EFI. The water pump will be actived when I flip the ignition switch on, but have its own relay and fuse...The head lights and running lights I will put back on the OEM switch, high beams will be on the OEM floor switch, and the radiator fans will be tripped by the Holley efi instead of manually...Too many times I have forgot to turn on the fan or water pump or both. Fog lamps, not sure yet. Maybe put those on the switch panel too. The Leash board has like 8- 70amp circuits, so I think I can do some trickery here.

Are you guys able to fire the car up with the fans and water pump on?

Also, I am going to deleted the big 5" tach and put a digital shift light in, and just try an make things nicer.

I am having zero fun trying to fit ANY of the switch panels I have back into the OEM dash. Its awful. The damn hole is so big, nothing fits. I ordered some carbon fiber plates. Going to use one to mount one of the switch panels in there. What a huge pain in the butt....

wiring can be so much "fun" at times..............

You are not kidding. Its like car yoga with wiring included.....Where is a good place to get 2ga wire from for the starter, and what do you guys like for car batteries now a days?

not related to wiring , but more to comfort when doing these types of jobs. Get yourself some old towels and lay on them instead fo the metal floor of the car. IT will make the job a little better

Looking at these batteries....Looks like they kick a BB over really well....2000ca and only 11.5lbs
https://www.fullspectrumpower.com/collections/p-motive-auto-batteries/products/p-motive2k

I have run Red tops for years, and they are over rated. Switched to an XS D3400 AGM 1150cca in my race car, and its heavy at 49lbs....And I have killed it twice in the lanes. I had it in the Cuda for a while, didn't have any issues with it in there, just a tad heavy.

I can't believe the price of that battery
My airplane battery was way cheaper than that and probably had similar cranking amps and cranking reserve at 1/8 the price

batteries have gotten outrageous in pricing these days.
lately, i have been using scrapyard batteries that i can get for $20.00, that are only a year or two old.
using the small size from late model foreign cars [not sure of the group size], they seem to kick my 10.5 compression 383 in my charger over with ease.
i know it's not a 15:1 compression engine, but those $20.00 batteries work great for me.
just my personal life experience with the batteries i have used.
your mileage will vary.

The cost of batteries, tires/slicks, motor parts, pit spots, gaskets, fuel, and basic repairs etc just went crazy this year.

The money is the main reason I took this year off. Between that and all my support folks retired and got out. Very difficult to do all this solo like I used to. So I will fix what I can this year, and try and have somthing ready for next year. Been wanting a reliable street/strip car I could try Drag Week with, but this is not the year.

A little progress.....

Battery Cables USA for your cable, they have anything you need as far as size cable with a couple of covering options, terminals, shrink wrap and great service, I got 2 different orders from them and both within 3 days, check them out.