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I am looking for bulkhead connectors to pass the the wires from the engine side of the harness to the inside of the car to the ECU/Relays and whatnot. I've seen a couple options through Deutsch, Waytek and Ampseal. Some expensive, some cheap.
Has anyone else used any of these brands or something else to accomplish this? I have 87 wires going to the ECU and then a few going to relays.
I would recommend keeping the series to one that is already on the car, for simplicity. Something like this might work, though it won't cover all of your wiring unless you use the Metri Pack 630 portions for 12V/ground junctions. https://mou.sr/39jAGhg
Why not run a two piece grommet or some other firewall seal for the wiring? A bulkhead seems overly complicated for something that won't be removed.
I have gone to a junk yard and cut them out of a car or trucks firewall. Otherwise they only go up to a certain amount of wires without being way too expensive.
My thoughts would be as the last post. Run the from the ECM and all other wires thru the firewall down low so anyone can't see them. Pinning out 87 wires would be a bit much for one connecter so now you might need more than on one?
Seems like you are adding 87 points of possible trouble shooting headaches.
Just my .02.
64SS that looks super clean! That may be what I go with. I’ve just always loved the look of the aircraft connectors although from my research so far they are too much trouble to even purchase
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Firewall Bulkhead Electrical Connectors 
