My 1960 300F had a pushrod fallout and get bent. I found this out because I lost oil pressure. Took it apart this weekend and found that it has 1964 heads with iron adjustable rockers. I don't have time or money to have a set of 1960 heads redone and installed so I need to fix it. It did have a slight lifter tick on that side when I got it but the car had sit around for 10 years without being driven much.

Where do I find pushrods for this? It has hydraulic lifters.

How do you set it up? How much preload on the lifter? The rockers have jam nuts and they're all there and tight. I assume the preload on that lifter wasn't done right when the engine was put in back in 1997.