Timing Chain Replacement Question

UPDATE :

I know this isn't my post but I have to reply to what i have done so far. maybe this will help someone else. I have re rotated the Big cam gear till the points are together in the center (chain not installed yet). after that I took out the whole distributor arm out, cleaned it and placed back inside while trying to pointing it to #1 and it fits perfect. now tomorrow I will seal everything back and see if I did this correct since it is getting dark..



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