$160 isn't cheap, but compared to the cost of a rare TD core around here (or a trip to Canada), it's still a better deal. I still can't quite grasp Justin's method of drilling holes in the main bearing journals (where do the holes go?), but I'm all ears if someone has an explaination of his set up that can penetrate my thick skull.BTW, the block that I currently have available for this rebuild takes 11mm head bolts. I definitely want to use a hydraulic turbo head, so would it be advisable to have my machinist helicoil the holes to 12mm, or should I find a 12mm block to start with? Thanks for the help