I think its a duc or VFR...rotor. I think if the rotor is bigger..he may have used 750 legs (higher mount pattern) and 500 calipers and hangers (may give more clearance).
The brake tee, i used that around 77, but I got tired of looking at the line bulging upward after the tee.. And the unbalanced look.. Found a solution. Drill stem nut..run straight fitting out of mc through nut and thru stem.. Then a tee.. Use -3 it looks cleaner..now it gets expensive..use two forged 45 degree ends, coming off the tee,then gracefully arc the lines to calipers behind the legs...like so....