You want to use a Moly disulfide paste on the cam lobes.
(Isky rev lube or same)
You want to use a motor oil high in ZInc and Moly....or...
A bottle if GM EOS is nice.
I use this stuff in my oil for the cam break in,
Molyslip E Oil suplement.
They also sell the moly paste.
It works. Do not dump the oil after the break in.
Leave it in, with the Molyslip E additive so it can work.
You can change the oil filter if you want ...
Keep the engine rpm up above 2000 rpm for the first 1/2 hour.
Do not allow the engine to idle slow for the first 1/2 hour.
Set the engine idle speed to 1000-1200 rpm for the first 1000 miles of street driving. Until the motor is completely broken in.
Then reset the idle speed to around 700-750rpm.