First, check the cam lopes for wear, if there are any signs of wear then it needs to be replaced. Also, check the bottoms of the Lifters, again if wear then replace.
The last thing you want to do is not replace something that sees a lot of rpms and wear and have it fail.
I was thinking Rocker Arms if you weren’t doing a cam with a little higher lift not Lifters.
Search on this sight, there are write ups on replacing the Rocker Arms.
I am thinking yes on the push rods, there is a higher lift Rocker Arm Kit with pushrods.
Look at the price of both the Rocker Arm Kit and a new Cam Kit and I stress KIT because everything will match.
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter