Best ifs kit? rms, hdk, gt suspension, or magnum force?

.......gt suspension uses a forged Mustang 2 spindle, and on here hdk says ebay spindle,
his website says wilwood spindle, so which is it

That question above doesn't make sense. It's like asking "Are you going to Cleveland or are you going
by bus?".

There seems to be some confusion here. You guys are mixing the TYPE of the spindle with the BRAND
of the spindle. The HDK uses a Mustang II (TYPE) 2" drop spindle that is available (BRAND) from eBay
(lower priced stuff), Wilwood (higher priced stuff) and probably a few dozen other places in between.

They choose to use this type because it gives the customer flexibility. They are the correct front steer
configuration and are standard street rod stuff, therefore the choices are many; just specify Mustang II
2" drop and pick your price bracket.