audi a4 1.8turbo bfb b6

Hi there people. I'm a fifty four year old mechanic, sort of semi retired. I bought an Audi A4 1.8Turbo bfb code really cheap. Stripped down the motor and it was whacked, dropped valves. I have rebored etc and got new pistons etc. I need as much as I can find out about this motor. The cylinder...