Fresh 302, block was decked, valve train noisy

Brooks James said
302 Ford, yes I know sacrilege
Fresh stroker to 347 build
Block was decked, amount unknown
Stock length pushrods, Comp cam hydraulic and lifters, roller rockers ,
Valve train was noisy, adjusted rockers, mostly quiet.
Took it for a drive, valve train noisy again.
I'm aware that too short a pushrods can cause noise. How about ones too long ?
I

When you adjusted the roller rockers to work with the hydraulic cam, did you adjust them down 3/4 of a turn after Zero Lash.

This gives the hydraulic lifter the proper preload. If you just adjusted them to Zero Lash, they are going to rattle.