I put a small mark with a permanent marker on the side of the rod that had the chamfer and after I had the thing all together I checked one last time to ensure the rods were all facing the correct way. I had no mark on the piston tops but only two valve reliefs so I put all the pistons on with the chamfer facing one way and long as the reliefs were correct the chamfers were as well.
I just went out to the garage and looked at one of my 428 stock rods and the chamfer isn't as pronounced as the forged rods but still there. I think you'll notice it more with the bearings in.
Sorry I don't know how to attach a website but try to get Kelly's Alberta firebird homepage. He explains it with photos.