Yeah, the harness is way too much of a pain in the ass. To redo it, it would only take about 4 hours or so. If someone wants to give me another dual-cam front engine bay harness, I'd be glad to do a write-up.
I'd love to try tube bending someday. Maybe when I get my Datsun. I'd think you would need to gut the S13/S14 underdash to really be able to route anything back there.