I don't know how old the timing chain is in my 65 Dart with 273. Since I am replacing the water pump, I figured I would go a step further and replace it. I read in the FSM that you need a camshaft tool C-3509 to hold the cam in place. My question is do I really need that tool which I don't have and do I really need to remove the distributor to replace the chain and sprockets? Additionally, if the oil pan gasket tears where it mates with the front cover, can I just use silicone to reseal that portion or do I have to pull the entire oil pan?
