An '86 Voyageur would have bosses for lowriders. A front rack as you have shown above is a newish thing. There are older flat-top front racks but they bolt at the fender eyelets and the fork crown, as on my old RB-T with its Jim Blackburn front rack.
Here is a pic of the original lowriders installed (web photo). Note that this one uses U-bolts to attach to the fork blades since there are no bosses but these would bolt to your Voyageur using the bosses instead (no U-bolts needed) and can be combined with the front rack as on my bike by the simple step of omitting the hoop and bolting the lowrider part to the rack stays...
...as on this Fuji. I used a setup like this on tour also.
An here is a pic of the Blackburn Custom lowriders.
So the question remains,
what do you want?