I have about 10k on my comp 848 lifters and send oil through the exhaust pushrods.919 comp springs 225/550 sp.I was eating the 829's up with k1000 springs in under 1000 miles .10k in 3 years of street beatin and many trips to the track,I am pleased .The reduced lobe aggression on this cam with the reduced spring pressure seems to have been the tcket for me .I will pull the hemi out within the next few weeks for PM and CSI investigation.I am looking foward to see how everything has held up.