Charles while I fully respect your knowledge I must argue your statement that anything less than L19s are sub par. There has been NO proven evidence that the torque on the head studs is insufficient to prevent head lift and in most cases it was caused because people don't know how to properly use the ARP lube and/or use oil instead. I HAVE however read where the L19s(durning long term usage ie non race/drag motors that are frequently torn apart) are causing corrosion issues in aluminum blocks due to the material they are made of!
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