Adjust valves

Yes having someone around with good experience is a smart thing to do. Start with #1 cylinder and roll engine over till it comes up to exact TDC top dead center on the compression stroke, (both Valves Closed, this is when the spark plug fires too, both rocker arms even, can be easy to be 1 revolution off when the valves are opening . . not good.) Set the recommended valve lash on both valves on number 1. Then roll it over and go to the next cylinder in the firing order and do the same, TDC on the compression stroke. So on and so on all the way through the full firing order, making sure each cylinder is up on compression stroke and both rockers are even when setting the valves.

Have done all kinds of VW 4 cylinder opposed engines that all had the solid lifters and adjustable rockers. Also have done the V8s with the hydraulic lifters and adjustable roller rockers, you have to deal with adjusting the additional preload with hydraulic lifters once you have achieved Zero lash first. So this is where it gets tricky to really identify the type of valve train you really have and not just by hearsay. Things can go wrong if you don't get it right.