Yeah that was a typo. It's a 1971 CL 450.
Regarding the cam oiling setup, now that you point it out, it does make sense to have it plumbed in a T, rather than the existing setup. I didn't plumb it, so I'll do so research and see what I can come up with.
Here's the lowdown on the bike.
Frame:
Bunch of tig welded reinforcements
1/4" aluminium engine mounts
Bungs welded into the existing frame for the rear sets
Black Bomber tank with repo badges
Upholstered Airtech seat
Chopped factory rear fender
GSXR 750 rearsets
Suspension:
CB750F DOHC fork, re-valved, shortened springs.
CB500 triples, smoothed and polished
Steering dampener
Vintage S&W race shocks
Bronze swingarm bushings
Ceriani headlight brackets
Tommasellli clip-ons
Engine:
Fully rebuilt with NOS parts including the shift forks, shift quadrant, springs cam bearing caps & intake manifold.
Cappellini moto cam chain rollers and tensioner
External head oiling solving the cam wear issues with this motor
Reground cam and followers, more lift and duration
+1mm oversized intake valves, ported
Cometic head gasket
JE forged pistons for 500cc & 10.5:1 compression
Rebuilt & re-jetted stock carbs
CB500t transmission
k0 clutch (6-springs), Barnett clutch plates
Starter Blockoff
Rewired charging rotor
Omar's 2:1 exhaust
I won't tell ya how much I paid for this thing, cause I basically stole it, lol.