I checked out the site. Nice to see there are other experienced Triumph shops for performance upgrades. I go to D&D Cycles in Pensacola, FL which I would recommend highly. They have been doing a similar BB kit with replacement barrels (nikasil, not sleeved) for some time now which is what I have. The total cost including all labor was around $1200. installed.
D&D doesn't have as much performance stuff as Triumph Performance, but have some things available they don't. Worth checking out for people in this part of the country.
D & D Cycles
