You have underestimated what a weirdo you are dealing with. I’m asking…is it possible?
Yes it is possible. I have done it to increase the wire gauge on a given circuit. If you do that, make sure all of the wiring feeding that circuit is also beefed up appropriately. You will also need to identify the correct terminal for that particular fuse blot. Again, doable but a pain.
You ALWAYS want to mount the fuse box upper left of left foot on inside of firewall, if at all possible.
Curious why you say that. I have mounted them in a variety of places based on convenience and never had an issue. The older Chevrolet vehicles mounted them there originally, but newer vehicles put them in all kinds of places.
EDIT: I will come back and second one of Bartamos's other comments. If you get the Speedway kit, you know exactly what you are getting and I have personally used at least 5 of them and had zero issues. I know others have posted that they also used the Speedway kits and were happy with them. Is that guarantee worth the 5x+ cost? That is up to you. I got one of the Amazon ones to try because their return policy is good and I trusted myself to be able to inspect/evaluate it. Based on your other posts, I am not sure you have that confidence.
The types of insulation on any of these is going to be irrelevant in this application as long as it is applied properly (which you can tell by pretty quick visual inspection). The places that I get concerned are the crimps at the terminated ends (they should be tight, clean, and uniform) and the quality of the wire itself. Low quality harnesses will use low strand count wire (which is prone to cracking and breaking in a vibration/flexing environment) and/or aluminum wire that might or might not be coated in copper to make it look the right color. To check that, you can either carefully shave a strand down to nothing and make sure it is copper all the way through or cut it with a sharp implement and inspect the end to see if it is a uniform material. I prefer shaving because the copper from the outside can stretch and cover the end of a cut well enough to make it difficult to tell.
