Wheel spacers?

Have a set made by transdapt that have been on my duster for four years, they recommend retorque every 2000 miles, but have never had them work loose or any problems with them. Converted front to BBP a couple of years ago and am still running them on rear. A couple of things you should watch for though....(1) the balance weights on the brake drums may have to be removed or there is the possibility they will break when torqued down...I found out when the tire shop broke one mounting my rally wheels and new tires, (2) the supply for the ones from transdapt is a little spotty, took months to get a replacement. Anyway hope this helps.