Fat Boy 99 ́ rear tyres on 150/80 B16

Hello friends, I drive a 99 ́ Fat Boy with the “fat” tire back Dunlop MT90B16 74H TL (130mm) I’ve been looking for a lot, but found nothing really meaningful…… Can I put the Dunlop 150/80B16 71H TL on the original disc rim 3×16 back and adjust that then past the original wide belt and get that so registered especially since the load is reduced from 74 to 71? If I didn’t measure myself, it would have to be at the belt just so pass by with max 1-2 mm air in between. Has one of them ever been “rebuilt” and also received an entry? Greeting Peter