I have been using this product for a while, and I really like it. I use a piece of heat shrink on the ends to finish it off and keep it from fraying.
https://www.amazon.com/Alex-Tech-25...ywords=alex+tech+split+sleeving&qid=1670941984&sprefix=alex+tech,aps,188&sr=8-3

 

I have been using this product for a while, and I really like it. I use a piece of heat shrink on the ends to finish it off and keep it from fraying.
https://www.amazon.com/Alex-Tech-25ft-Protector-Sleeving/dp/B07FXF12HC/ref=sr_1_3?crid=3F4K13HBF3KSA&keywords=alex+tech+split+sleeving&qid=1670941984&sprefix=alex+tech,aps,188&sr=8-3

I use this stuff as well.....works and looks great.

 

When I was prepping/cleaning the harness to reinstall in my car I had bought a few rolls of friction tape similar to what the factory used. What I found had a little more cloth texture than the original stuff, but it was as close to the factory stuff as I could find. Wound up not using it because the original wrap on my harness looked so good after a cleaning. Biggest thing with underhood wiring wrap is heat, so want to make sure you're using something that isn't going to melt.

 

When I was prepping/cleaning the harness to reinstall in my car I had bought a few rolls of friction tape similar to what the factory used. What I found had a little more cloth texture than the original stuff, but it was as close to the factory stuff as I could find. Wound up not using it because the original wrap on my harness looked so good after a cleaning. Biggest thing with underhood wiring wrap is heat, so want to make sure you're using something that isn't going to melt.

"TESSA" brand tape might be what you have. That's a good option for "wrapping" it like the OE style and holds up pretty well. Otherwise as others have said, the expandable split-loom certainly is a good option and looks better than the stupid corrugated stuff. Your other options are going to involve (or at least be easier) disassembling the whole harness which usually is past what most folks want to do.

All sorts of sizes for the split loom:

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I use the split loom like @Gump, it comes in many sizes for single, multiple or thick wires. Also end it with some shrink tubing if I can to keep it in place or a small zip tie if I can't get heat shrink on it.

 

Same here as what @Gump suggested. I'll cut it to size and then hit the ends with a lighter to melt the individual strands together. Once I have it all together, I use that black silicone tape that bonds to itself when I wrap it around the end of the loom.

 

Once I have it all together, I use that black silicone tape that bonds to itself when I wrap it around the end of the loom.

Self-fusing silicone tape. No heat to accidentally ruin the loom. I use the heavier Plymouth/BISHOP 20 mil Plysil on my custom harnesses (but there are many brands), and it works nicely to wrap at those branch junctions and exits without any sticky stuff. Use clean fingers.

 

Thanks guys. I ordered the stuff @Gump recommend.

 

IIRC there is a company that makes a tool for inserting the wire into that loom that Gump recommended... Eastwood maybe.

 

Here is one version of the tool you are referring to. Painless makes one too.

Amazon.com: Electriduct Wire Loom Insertion Tool Set for 3/8" to 2" Conduit Sleeving Installation : Everything Else

 

Here’s my tool 👍

 

I have always used wire harness tape. Very similar to electrical tape, but without the glue. Harness tape is what Ford used, so you end up with factory appearance. Electrical tape should be avoided, the first time it gets hot you'll have the glue all over the place.

Available from any decent classic parts seller, in various widths.

 

This stuff is great, https://www.summitracing.com/parts/sum-890352

Plus the tape, https://www.summitracing.com/parts/kcw-9100

 

If you wanna get real crazy, conceal all your wiring and plumbing inside the body, frame, and behind panels. It looks super slick to do that.
I'm a purist, myself, and love the factory wrap for my own cars, as well as the convenience of access.

 

Braided Sleeving Categories - WireCare.com

www.wirecare.com

I bought my stuff from here. They’ve got all kinds of stuff.

 

I also use the Tech Flex stuff with static-cling harness wrap on the ends - they don't fray at cut ends anyways but it does make it look cleaner. I like using the split loom stuff because it makes it easier to trace wires, change things around, etc. as needed. The second I fully wrap any harness is the second that I find myself needing to disassemble the whole thing for various stupid reasons...