Noticed the Quaife is a bit longer than the RBT unit and therefore the chassis has to be modded. Anyone have a drawing/pic of what all needs changed to fit? Can’t seem to find any threads on it. Also Quaife only rates to 500hp but seems like every new SPF roller I’m seeing on the market has the Quaife....and most all are dropping in 535-600hp. Is 500 the max for the street or can you push these to 550 without issue?