I just picked up one of each, a W-1 483s or 574s and a YF 964s The W-1 looks great but probably needs rebuilt, which is fine, I like to rebuild carburetors. The YF has been professionally rebuilt and looks beautiful but I don't know the rebuilder. So, taking their current non rebuilt/rebuilt condition out of the equation, is there an arguable benefit to running one over the other? This is a daily driver 216 with a T-5 and sees lots of in town and highway use.