Not sure about the 8m but I have the 7m - boom length 204cm
used it twice now, awesome sail ! I like the power and with the 3 cams how easy it is to pump onto the foil
Don't know the luff length but I was told by severne the 8 will rig on a 460 mast as they don't do a 490 rdm. Probably with a long rdm extension. Obviously severne mast recommend but I rig my 7 on an ezzy and it looks sweet.