Now the twelve o clock marks are lined up in back at same time. I remember on front bank single line on front exhaust and intake lined up on double line marks at 12 o clock . Remember back of cam wheel for 12 o clock markings on cam wheel linedup with marks on valve cover. When cams are tightened down, be careful if you turn the sprocket . Feel any bind STOP ! ! Take your time and recheck your markings a couple of times. This is hard enough to do right in front of ya let alone in the vehicle. Did it in the vehicle the first time as I set it wrong on the floor. So do it here the first time right or you will regret it having to do it again in the vehicle. Just remember to turn it over slowely a few times to make sure nothing is in a bind. Valves will bend and you get to do it all again.