speedster93b
+1y
requirements? well ya need a truck, and some sort of spring to support the weight of the truck after the wishbone is on. you'll likely want to put 2 longitudinal links somewhere in the mix... i guess i'm not really sure what you mean by requirements
its basically the same as a 4link, but with one singular (usually) upper bar connected at two points to either the axle or frame, and one point at the opposite, making a wishbone. you run your (usually) lower bars the same as a 4link, parallel with the frame. they don't however HAVE to be parallel, its just common and simple.
people commonly use a wishbone to avoid moving a gastank to fit a proper 4link. i'm sure you can find PLENTY of people that swear by a 3link, i had one... i just re-did my setup to a 4link. my wishbone got really good articulation BTW so if your wanting to hit sides, that might be a thing to consider. i felt like it didn't control the lateral movement of the axle as well as a 4link does tho, and i'm running big wheels with close quarters, so i changed to what i thought was better for my situation.