360 LA squeel / scraping noise like drive belt on passenger side

Did you know?
that LA rocker shafts have to be correctly clocked
and that 318 rockers are different from 340s,
and among all of those are lefts and rights,
and when installing a high-lift cam, you gotta check the rocker to retainer clearance,
and the pushrod to p-rod tunnel clearance.
Oh and if you have aluminum valve covers, then under the oilcap is a tin baffle, that usually has to be clearanced to the rocker arms.