Nylon is fine...2500 mi & no leak since I installed fitting refd above from Mark @ Dyamic. I'd be concerned w/ braid abraiding wiring behind dash,through firewall bundle and if routed over drivers inner fender contacting wiring harness...lots of vibration. I keep all my braided
oil and H2O lines away from any wiring chafe after I noticed abraison...guess would be OK if the braided line is protected w/ a sheath where contact w/ wiring is likely...shure dont want a short ckt or fire.If you dobt this is a` concern rub your hand over a braided line....it's abraisiv! Never had probs w/ nylon on many 60's muscle cars as long as properly installed (not routed near headers). Steve SPF758