Small block bolt in cams ?

Oh ok, well pretty much here's whats up...if u want the valves to be controlled properly by the cam at peak rpm, u need to have the correct pre load..'so check/measure for the correct length push rods and buy them'...however for yrs all of us at some point have just slid in that .509/.508 hyd cam in and threw caution to wind with no real issues...so that ur call. I myself would go ahead and measure for and buy the right length push rods to have the correct pre load so that I don't have floating valves or more 'lost in translation' power on ttop of this next issue ill mention..rocker ratio, they're lack of..since stamped rockers are really not 1.5 , and cams are advertised based on the 1.5 ratio in this case..
What I would do is this, we all know that those factory stamped arm are less than 1.5 ratio...so u lose lift, or should I say u get less than what the cam advertises....so I would shoot for a cam with the duration I wanted as well as lea and then try to compensate for the lift lost through the poor rocker ratio by picking a cam with about .020-.030 more lift than I would like, that way u end up where u wanna be. Just a thought

Lastly , how much u can lift the valve before it runs into the guide and or pinches the seals, better check that before going over .520+