hi so after installing new cams valves and springs at high rpm it smokes from the rocker cover breather and leaves a patch of oil on my bonnet

it dosnt do it until you hit around 7000rpm or free reving it smoke 7000 to 8500rpm

car drives great has new rings etc 175psi compression on all cylinders

never did it before the new cam so it must be normal for smoke at high rpm? theres no oil burning smoke out the exhaust

also dont have anything hooked to the breather yet just venting out to atmosphere

Thanks!

The answer's in the last line! If you don't have PCV it will vent oil vapours/ blowby gasses out the breather. (There's always blowby, it just increases with wear.)

the engine block breather pipe is on the pcv

the rocker cover breather is usualy on the air cleaner base but mine goes to the atmosphere at the moment

Probably need a bit more info then, like what carb(s) manifold etc. Might be worth checking that you're getting vacuum to the rocker and if not if there's a blockage or fault somewhere. I fresh engine with a working PCV system should suck air at the breather. I rebuilt a 253 years ago and it would squeal (sucking air) through the oil filler cap until I put the right breather setup on it. Would suck your hand on when you put it over the hole.

The new valve seals may be leaking. It is not normal