Got the heads apart today #3 chamber took a nasty hit. Have a few bent valves so I'll order a whole new set tomorrow and hope we have room to surface the head into good working order. Diamond has reviewed the pistons and believes there's a problem with the way the groove was machined, they're investigating further but in the meantime they'll expedite a set and get them out at no charge. Still waiting to hear back from Titan about oil pump fitment but I believe I'm going to cut my junk pan up and take some measurements.