Overhauling 3 Cylinder Engine

I was on overhauling 3 cylinders engine. First i am disassembling the Engine assembly, and then i was going to remove  the oil pan. Then removing the oil strainer for the cause not to be tampered when removing another parts. Then i removed the crankshaft pulley (because there was no timing belt already). Because we buy that in aftermarket. But it still in good condition. After i remove the camshaft pulley because we are replacing the cam lobe because it was have to bad condition. It will not in standard measurement or out of his slide parts because of rust.Important of the parts or bolts to systematize. So that after you will perform overhauling. It will easily put back from where they are. After that we replace the camlobe into the head cylinder. But the stock camlobe are not long as we replace from the aftermarket engine. We replace that for the reason it will have a longer lobe than the stock. So that the distributor assembly can put after it.