Those bars probably won't work. The riser spacing is stated. He needs to look for bars that will have the proper spacing for his Ace.You're looking for a "T-Bar" not a "Drag Bar." Lots of options out there.
Wild 1 1-1/4" Chrome 4" Pullback Drag Handlebar | ZZ50925 | J&P Cycles
These are like the bars I'm looking for just need to find someone who has an ace that's used them to make sure they workSo this place has way more than just these....but it gets you to their place...
WPS-56-9565BK HANDLEBAR 7/8" WIDE-CENTER DRAG BAR BLACK TRIUMPH NORTON BSA CAFE RACER BOBBER - Panic Cycles