[Rich Biebel]

I think you can use any std solid or hydraulic lifter but if it's a roller it needs the taller lifters as the lifter bosses are +.300". The onlyte thing you might need to check is if the lifter hangs down to far and uncovers the oil passages on the lifter body. I built a 502 for a customer a long time ago so I don't really recall the cam details but I think it was a rolller and we used the tall lifters.