Mine is a looong way from being that clean. Thankfully though, I've not really
had to spend much time under the hood, save for an alternator and water pump replacement.
My valve cover was leaking so when it came time to replace the gasket I also took the extra time/effort to paint it nice and good too. I kinda like the Ford gray and as someone else stated earlier, maybe when the rest of the truck is complete I may pull it and give it a make-over for appearance sake.
What I have been doing in the meantime is to slowly start to tape the wire bundles up, place them inside the split look tubing...etc. Little things make a big difference over time.
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'86 F-150 SB/300 CI/4 SP/OD (adding more weeky)
'02 Taurus SES (100K @ 100mph)
'06 Honda Rancher 4WD ES (max modded)
...all kept at a lil house way out in 'da stix...