360 LA installing Promaxx Aluminum heads

Have some downtime today waiting for a drill bit to arrive, need to resize the hole in the new intake to 3/8 NPT for the temp sensor.

Unboxed the Harland Sharp roller rockers and shafts.. figured I'd get a head start on getting them together. Cleaned first rocker and shaft ID and OD and tried to fit with light coat of assembly oil... rocker barely goes onto shaft. It's tight... like REALLY tight. Left it on the end of the shaft and I was barely able to get it to move. Took it off and inspected. Looks ok.. no galling in the aluminum. Is it common to have to touch up brand new rockers?
Mismatched parts and the customer being stiffed with the finishing cost is the way of the future..
Even though HS and I'd say Mancini know of the issue, they still shafted you and managed to get you to work for them at the same time..!!