360 hydraulic lifter valve lash

i pre-pumped the lifters and primed the pump before installing

Sigh.....

Here's the deal, there's a lot of math that goes into valvetrain, here's the short skinny.

Your lifters have an X amount of distance between the socket and the face.
Your pushrods have and Y amount of length.
Your valves are supposed to stick out of the head an O amount of distance from the face.

So, if all you did was have a slight tick, changed the cam and lifters, and had all this distance..... Something changed with X or Y, or, your cam is ground on a smaller base circle?

IDK.

Did you check the pushrod lengths? I mean, a 360 has a certain length pushrod, (I am nowhere near that info) is it the correct length of what you have?