Ive replaced the head gasket on my suburban 5.7 350 tbi, now everything is back together. I marked the ditributor, but along the way the marks are gone. I had the entire assembly out of the motor (gear and all) I just need to get the truck started, doesn't have to be perfect, just needs to fire. How would I go about timing it again without a timing light? Mine is broken. Please give me as much info as possible from step one. Thanks in advanced 