Instructions/tips on camshaft change

Is the engine in or outta the car? Might be a good idea to prime the engine with a drill down the dizzy hole once everything is in.
As badsport said, get a dbl roller timing chain and gears.
Make sure before fire up that you have engine on TDC #1 cyl ready to fire. Or approx 10* BTDC.
Garden hose and fire extinguisher ready just in case.
Good luck!

Oh what engine is this?