I have a 2.2 4 cyl I am building for circle track. I assumed when I bought the car that it had the original engine as the man knew nothing about the car... As the car was a 94' I believed the engine was a 94'. Now that I am pulling the motor apart I have noticed the motor did not have roller lifters. In my haynes manual it said 94' engines had roller lifters. I have a few numbers on the side of my block: 10156012, 6m6, s6. If anyone could identify the engine it would be greatly appreciated.. Thanks in advance for all replies.