What are the best headers for 66 Dart V8?
guess it depends what you mean by best.
you want the best:
fitting?
performing?
price?
performing: depending on your combo would be in my opinion the hooker fenderwells i would think followed by tti (bigger tubes then the dougs) then the dougs then the spit fires ( spitfires will go into the mid 12's easy though). remember though with the TTI's you need a special expensive starter. not sure what ones will fit with power steering though.
fit wise: i would say the spit fires would be best. they are easy to install and clear everything well (not sure about power steering though)
price: spitfires win by a mile.