Should be a WT-645 carb, and any local small engine shop can get rebuild kits for em. Many do use a bellcrank to get their pushrod needs met, if you want a straight shot, call Ralph and have him send you a new spacer.

Ralph Cunningham
928 635 2455

You didn't happen to mention why you are in search of Walbro items for your engine anyway....what's going on?