I have a 350 that I took apart with very low miles. '72 block with 260 Comp Cams (12-210-2). I kept the hydraulic lifters in the same order, but didn't keep the pushrods, rockers arms, and nuts in the same order. I just watched something that said I have to keep all the valve train in the same order. I guess I didn't realize that, is that true, or just in a high mileage situation?