I'm getting ready to order, buy, a wiring harness for one of my street rod cars (1940 Ford Tudor), which wiring harness company's do you guy like and which ones to stay away from.
I really will appreciate all the help I can get on this, thanks in advance

i am probably one of the only ones who prefer to make my own, one wire at a time, buying quality components, then "digging in".
not casting aspirations against any harness manufactures out there, just expressing my own personal preference.
your mileage will vary.

Maybe one of// but definitely not the only one

I've used American Autowire several times - '53 F250 upgrade (alternator & 12V Neg ground), several LS/FJ40 swaps - with excellent results.
They have a fairly inexpensive hot rod harness, or the more dedicated type.
I'll use them again if the need arises.

I've taken a couple of Dodge truck harnesses apart on the kitchen table and waded thru previous owner butchery and rebuilt them, adding in underhood fuse boxes sourced from other vehicles that are in my local junkyard. Much better now that there are no more fusible links... Lots of uninsulated barrel crimp splices, solder and marine grade heat shrink tubing involved.