Was the Stinger wired in or just the distributor as is? They can't both work at the same time. The very early MSD 5 box worked with the points in place. Later ones assumed you had HEI or some other electronic ignition and worked with those. I gave my MSD 5 to my cousin who has a 1969 Baracuda still running points. For now you can use the points and just get it running. Those look pretty clean but I would check them for pitting, if so maybe get a new set with a new condenser. I don't know how old you are but have you ever set up points? There is a mechanical setting you do with a feeler gauge, I think it was .019". That will get you running. But the better way is with a dwell meter. See that little knob that points to the window on the cap? That is for sticking an Allen wrench in to adjust the dwell while the engine is running. You attach a dwell meter to the coil and set the dwell [time the points are closed] to 30°. I would try to get a better coil too. That one looks cracked and it is pretty old. There are much better ones available. Referring again to the Stinger sheet, without the magnetic pick-up and reluctor it is useless. And if it failed electronically then it is just junk. Just know it was a very highly regarded ignition system back in the day. Once the HEI's hit the junkyards there was no need for aftermarket systems. The HEI really is king. For those that want the points distributor to look stock then the conversion kits are very useful. Probably the best and most available is the Pertronix Ignitor kit. It fits under the small points cap and looks stock, but makes tremendous spark.