Hello,My name is Roger Morrow and I live in Northern Illinois. I have had my 1968 AMX in the garage for about 20 years. I am pretty sure that the last owner blew a piston and replaced just one piston. This resulted in excessive engine vibration so I never drove it much. I have recently retired so I should have time to begin restoration. I have been looking at an engine builder in the state of Washington (S&J Engines). They seemed to know about the oil issues to the main bearings and the need for balancing with the harmonic balancer and flywheel.Any other ideas for and engine builder would be appreciated. I look forward to sharing resources and ideas on this forum. Have a great day!