Vavle stem height....

dan, bad machine work, check for coil bind, you have to have seat retainers. the machine shop sucked. now you will have to go adjustable rockers,use the 3 position method , now you know next time to check the valve height and seat height with springs and locks in place anytime you pick up a set of heads from the machine shop,sorry to hear that. dont feel too bad, lot of new aftermarket heads have different seat heights ,sometimes the manufacturer compensates by grinding a few valves ,sometimes they dont bother. sorry to hear the piss poor job they did .025 to .050 is the #anything more than .050 or under .025you need a n adjustable pushrod and using the 3 position method set preload to .040 and get the right length pushrods.