Welcome to CHR Joost!

I'm with 34_40 on this one - I think you'll be fine to use the stock push rods, adjust 1/2 turn from zero lash, button her up and drive it like you stole it. I'll use checker springs and a push rod length checker when installing new cam with a different profile or when going from flat tappet to roller but on a standard rebuild with a block and head deck it's typically not necessary.

Have fun,
Glenn