best 5x4.5 disc conversion on my 1968 dart 2dr post

Oh please thats like comparing apples to oranges OE Mopar brake setup's are no where near the quality fit finish or weight reduction of the Wilwoods and they look a hell of a lot better..

Right. Except you can't buy parts for them anywhere local, the center bores on some of their kits don't work with a lot of OE wheels, and some of the kits widen the track width more than the 73+ disks. Oh, and they cost more too. You can get a set of the 10.95" OE disks from Dr.Diff with calipers, caliper brackets, pads, rotors, bearings, spindles, hoses, splash shields and hardware for $445. You can add the ball joint adaptors and keep your small ball joint UCA's and still only be at $480. The cheapest Wilwood kit you can get is $787 from Summit, and that doesn't even come with brake lines which are another $60.

Heck for $600 you can get the 11.75" Mopar disk set up from Cass as long as you have 15" rims, still includes everything and again you can add the ball joint adaptors for another $35.

Sure, the Wilwoods are lighter. The multi-piston set up probably works a little better than the OE single piston set up too. But unless you're running something other than BFG T/A's you'll probably never notice the difference anyway because you'll be tire limited, especially if you go with the 11.75's. And of course the OE set up is bomb proof and tested over millions of miles and decades now. I've pulled calipers off of wrecking yard cars that were in perfect working order. Wilwood has been around a long time now too, but for longevity I think you'd be hard pressed to outlast the OE single piston calipers. They aren't fancy but they work well.

And I'd rather deal with Cass @DoctorDiff over a Wilwood tech line any day of the week.