What size push rods are needed for these heads (SB)? I saw they recommend the hardened set. I was looking to order there stainless rocker arm set as well.
Pushrods used would depend on cam used. To get everything right it’s never a fits all as you may need a thicker pushrod, longer, or even shorter. Sometimes clearance issues happen when different ratio rockers are used so it’s nice to get everything right while it’s on an engine stand. Then there’s always rocker geometry to get right.