Right, suck your pencil a bit and point it at bits of the engine whilst nodding. Use your pipe if you have one. It wont help but will impress passers by and make them think you know what your doing.
Whilst your posing, bend back the tabs on the cam sprocket and get the bolt out.
There are several ways of doing this and one of them is buying stuff. I dont do much of that so I didnt use a dial gauge or timing wheel or owt else that costs the rent money.
Take one plastic drinking straw and a golf ball sized blob of Plasticine from your daughters bedroom. If she is resident try throwing stuff at her from behind the door as they can inflict a nasty bite when provoked. Cut the drinking straw in half and make a point at the end of one of them.
I will take it you have found the EP mark on the flywheel and its bang on the pointer. Now remove the belt tensioning thingamabob. Try not to let it explode all over the drive, its a bu@@er to find the spring. Remove the slap pad. Remove the chain.
At this point your supposed to gently turn the cam shaft sprocket until your sure valve number one is just on the point of being fully open and then turn until its on the point of almost starting to close. In reality you get it almost there and one of the other valve springs that is wound up like grannies mantle clock, lets go and throws the cam way past the point you wanted it. I did this several times and got very pizzed off with it so I fully loosened off all but valve number 1 via the tappet adjustment screws.
Now take half the plasicine and stick the pointy straw horizontally across number one rocker arm. Take the other and stick it vertically on where the rocker cover sits. You now have a vertical scale and a pointer. As you turn the cam back and forth you can mark the two points on the straw where the valve is just fully open and where it almost starts to close. Now turn it half way between the two points and dont move it again.
Get your new chain and try fitting it between the two sprockets (only on the side opposite the tensioning thingamabob) It wont fit................ It will sag like a saggy thing. Thats coz it aint crap like the last one.
Remove chain. Gently pull off cam sprocket and whilst watching the drinking straw so nothing moves, turn the sprocket to the next slot and replace. Try the chain again. Continue this until the chain fits across the sprockets like a glove. I had to try all of the slots and found the last one to be bang on. Just my luck.
When your happy, re fit the tentioner and new slap pad. Check your Bobsticle gauge and the fly wheel. Everything should still be bang on.
This is when you have to put the whole car back together, refill with coolant, set the tappets and pray you dont have to strip it all back down coz its no better.