gavnwend said..
Just try it, that's the only way to fine out. I got the V8 6.2 (21). I rig mine on a older tushy mast rdm 400,works for me. The best mast is the pryde 430\400.rdm or std size.l also noticed the newer pryde stm mast are slightly narrower.l think I got a pic of my sail rigged on my profile fotos.hope this helps
They definitely are narrower. The V8 camms won't rotate properly on the older, ( X6, X9 ) , masts. Pitty , because they are really good masts.