? For the Forum on Adjustable Pushrods

Newbie here. I posted my story in the welcome section. I was wondering if someone has some advice or can steer me to a article on adjustible pushrods. I bought a rebuilt 1968 340 for some dude and he told me to replace the push rods with adjustible rods. I bought a set from Crower. Now, I've always been more of a parts changer than a mechanic. I want to be as hands on as possible so I can say I built most of the car. I was pretty good around cars in my teens and 20's but at 47, I've been away from it for a while. Help a brother out so I do this right?