Hi, to all. I have a 68/69 390 I am trying to build to go into 70 amx . I have a few questions I have been pondering, and would some additional imput from some one more experienced than i am . 1. Accordinr to the books I have the 68/69 390 piston sitts .047" down the holewould it worth while to change that to 0 deck height or leave it alone? If it is worth while can a 401 rod be used to do this? I know the piston will have to be machine for proper deck height, or would buying pistons with the correct compresion height be better? 2. Can the 68/69 connecting rods be safely be opend for wrist pin bushings?thank you very much, Joey