I just put new CHRAs in my twin and never done one before. I used a marker to mark where there they lined up. They will fit in any position. First lesson was to use Blaster PB spray on bolts to loosen them. Yes I broke the first one I tried to remove. Knowing my old CHRAs were bad I used a punch and hammer to tap the exhaust housing apart. Snap rings were easy to remove. Just make sure intake side O ring is in place prior to installing the housing. Exhaust side was pressed back together using the bolts a few turns each until all were tight. Not a hard job. Pulling and putting engine back in was the hardest part. Hope this is helpful for you.
