Uncle Fester
+1y
The most cost effective method is the salvage yard. Find other knuckles that work and shafts that will be the length you require. I recall Aerostar as a name my buddy and I looked at. The more expensive route is after market components. Flaming River has shafts you can cut to length and knuckles for different applications. It can add up fast though. Good luck. In the end I went with a Mustang2 rack so it was much easier.